101 Orange St, Suite A-1
Auburn, CA 95603
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Familiarize yourself with AERC Rule 13 and the Drug Rule Appendices. These drug testing results are published in Endurance News and on the AERC website.
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 08/17/2024 | Spanish Peaks Pioneer | UC Davis | 12 | 12 | 0 |
| 08/10/2024 | Louise Riedel Bra Buster Memorial | UC Davis | 12 | 12 | 0 |
| 07/27/2024 | Tahoe Rim Ride | UC Davis | 12 | 12 | 0 |
| 06/22/2024 | Northeast Endurance Team Challenge @ Fair Hill Intl. (NE) | UC Davis | 12 | 12 | 0 |
| 05/31/2024 | City of Rocks (NW) | UC Davis | 13 | 13 | 0 |
| 05/24/2024 | Caja Del Rio (SW) | UC Davis | 12 | 12 | 0 |
| 04/26/2024 | Eagle Canyon (NW) | UC Davis | 11 | 11 | 0 |
| 04/13/2024 | Racing Stripes (CT) | UC Davis | 15 | 15 | 0 |
| 04/12/2024 | Grizzly Mountain (NW) | UC Davis | 10 | 10 | 0 |
| 04/08/2024 | Scenic Spruce Creek Spring Fling (SE) | UC Davis | 12 | 12 | 0 |
| 01/27/2024 | Do The Hokey Pokey (SE) | UC Davis | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 10/28/2023 | Weiser River Trail Halloween | UC Davis | 10 | 10 | 0 |
| 10/21/2023 | AERC National Championships 100 | UC Davis | 12 | 12 | 0 |
| 10/19/2023 | AERC National Championships 50 | UC Davis | 12 | 12 | 0 |
| 10/07/2023 | Mustang Memorial | UC Davis | 12 | 12 | 0 |
| 09/16/2023 | Virginia City 100 | UC Davis | 10 | 10 | 0 |
| 09/02/2023 | Old Selam | UC Davis | 7 | 7 | 0 |
| 07/15/2023 | Broxton Bridge Nightriders | UC Davis | 4 | 4 | 0 |
| 07/14/2023 | Broxton Bridge Nightriders | UC Davis | 8 | 8 | 0 |
| 06/24/2023 | Santiam Cascade | UC Davis | 13 | 13 | 0 |
| 06/10/2023 | Fort Howes | UC Davis | 6 | 6 | 0 |
| 04/08/2023 | Lead Follow at Bumble Bee Ranch | UC Davis | 7 | 7 | 0 |
| 02/04/2023 | Weather Permitting (CT) | UC Davis | 11 | 11 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 10/21/22 | Spook Run (SE) | UC Davis | 11 | 11 | 0 |
| 10/15/22 | Red Rock Rumble (W) | UC Davis | 22 | 22 | 0 |
| 10/02/22 | Autumn Sun (NW) | UC Davis | 8 | 8 | 0 |
| 09/10/22 | Cougar Prowl (CT) | UC Davis | 10 | 10 | 0 |
| 09/10/22 | Hector Half Hundred (NE) | UC Davis | 12 | 12 | 0 |
| 09/09/22 | Midnight Rider (NW) | UC Davis | 6 | 6 | 0 |
| 09/03/22 | Old Selam (NW) | UC Davis | 10 | 10 | 0 |
| 07/20/22 | Tahoe Rim Ride (W) | UC Davis | 12 | 12 | 0 |
| 06/28/22 | Mary and Anna Memorial (NW) | UC Davis | 16 | 16 | 0 |
| 06/11/22 | AERC National Championship 100 (NE) | UC Davis | 12 | 12 | 0 |
| 06/09/22 | AERC National Championship 55 (NE) | UC Davis | 12 | 12 | 0 |
| 03/26/22 | McCulley Farms (SE) | UC Davis | 12 | 12 | 0 |
| 03/12/22 | Celebration 2022 (SE) | UC Davis | 12 | 12 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 9/10-12/21 | Distance Horse National Champs-Big South Fork (SE) | UC Davis | 12 | 12 | 0 |
| 9/4-5/21 | Crazy Daze of Summer (NW) | UC Davis | 9 | 9 | 0 |
| 8/27/21 | Iron Mountain Jubilee (NE) | UC Davis | 12 | 12 | 0 |
| 8/14/21 | Bearfoot Boogie (MW) | UC Davis | 12 | 12 | 0 |
| 7/3/21 | Rock n Roll at Muckleratz (NE) | UC Davis | 12 | 12 | 0 |
| 6/13/21 | National Champs @ Fort Howes 100 (MT) | UC Davis | 12 | 12 | 0 |
| 6/11/21 | National Champs @ Fort Howes 50 (MT) | UC Davis | 12 | 12 | 0 |
| 5/1/21 | Still Prineville (NW) | UC Davis | 13 | 13 | 0 |
| 4/30/21 | Broxton: Let’s Have Fun Riding (SE) | UC Davis | 12 | 12 | 0 |
| 2/20/21 | Gator Run (SE) | UC Davis | 12 | 12 | 0 |
| 5/1/21 | Still Prineville (NW) | UC Davis | 13 | 13 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 11/28/20 | JD’s Carolina Ride (SE) | UC Davis | 12 | 12 | 0 |
| 11/7/20 | Trace The Trails (CT) | UC Davis | 12 | 12 | 0 |
| 10/10/20 | Iron Oak (MW) | UC Davis | 12 | 12 | 0 |
| 10/3/20 | Quitaque Climb (CT) | UC Davis | 9 | 9 | 0 |
| 10/3/20 | Skymont (SE) | UC Davis | 12 | 12 | 0 |
| 9/26/20 | Buffalo Run (CT) | UC Davis | 9 | 9 | 0 |
| 9/12/20 | Lincoln Trail Ride (MW) | UC Davis | 4 | 4 | 0 |
| 8/1/20 | Black Sheep Boogie (NE) | UC Davis | 12 | 12 | 0 |
| 7/24/20 | Old Dominion (NE) | UC Davis | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 6/8/2019 | Flagstaff Monsoon Fever (SW) | USEF | 12 | 12 | 0 |
| 5/25/2019 | Grand Island (MW) | USEF | 12 | 12 | 0 |
| 5/25/2019 | Klickitat Trek (NW) | USEF | 12 | 12 | 0 |
| 5/25/2019 | South Mountain Spring (SE) | USEF | 12 | 12 | 0 |
| 4/28/2019 | Mt. Carmel XP Pioneer (MT) | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 9/1/2018 | Tatman Mountain (MT) | USEF | 12 | 12 | 0 |
| 8/25/2018 | Northeast Challenge (NE) | USEF | 12 | 12 | 0 |
| 8/18/2018 | Run for the Cactus (MW) | USEF | 12 | 12 | 0 |
| 6/23/2018 | Creek to Capitol Peak Challenge (NW) | USEF | 12 | 12 | 0 |
| 5/19/2018 | Border Battle Boogie (MW) | USEF | 7 | 7 | 0 |
| 4/14/2018 | Bridger Trail (MT) | USEF | 6 | 6 | 0 |
| 4/7/2018 | Foxcatcher (NE) | USEF | 13 | 13 | 0 |
| 2/25/2018 | Land of the Sun @ Boyd Ranch (SW) | USEF | 12 | 12 | 0 |
| 2/11/2018 | Old Glory (CT) | USEF | 8 | 8 | 0 |
| 1/9/2018 | Winter Gallop at Dunn’s Creek (SE) | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 10/11/2017 | Lead Follow at McDowell Mtn. Park (SW) | USEF | 12 | 12 | 0 |
| 10/29/2017 | Moab Pioneer (MT) | USEF | 12 | 12 | 0 |
| 10/14/2017 | Foothills of the Cascades (NW) | USEF | 12 | 12 | 0 |
| 10/7/2017 | Man vs. Horse (SW) | USEF | 12 | 12 | 0 |
| 9/30/2017 | Outlaw and the Virgin Pioneer (MT) | USEF | 12 | 12 | 0 |
| 8/20/2017 | AERC National Championship 100 (MT) | USEF | 10 | 10 | 0 |
| 8/18/2017 | AERC National Championship 50 (MT) | USEF | 13 | 13 | 0 |
| 7/1/2017 | Endless Valley (MW) | USEF | 12 | 12 | 0 |
| 6/24/2017 | Dead Dog Creek (MW) | USEF | 12 | 12 | 0 |
| 4/22/2017 | Lone Star Express (CT) | USEF | 12 | 12 | 0 |
| 3/25/2017 | Rabbit Run (NE) | USEF | 12 | 12 | 0 |
| 3/4/2017 | Take No Prisoners (SE) | USEF | 12 | 12 | 0 |
| 12/31/2016 | High Roller (CT) | USEF | 12 | 11 | 1 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/5/2016 | Indian Springs No Frills (SW) | USEF | 8 | 8 | 0 |
| 10/8/2016 | Indian Territory Elevator (CT) | USEF | 12 | 12 | 0 |
| 9/17/2016 | Scenic Spruce Creek Preserve (SE) | USEF | 12 | 12 | 0 |
| 9/10/2016 | Big South Fork (SE) | USEF | 12 | 12 | 0 |
| 9/10/2016 | AERC National Championships 100 (MT) | USEF | 12 | 12 | 0 |
| 9/8/2016 | AERC National Championship 50 (MT) | USEF | 12 | 12 | 0 |
| 9/4/2016 | Old Selam (NW) | USEF | 12 | 12 | 0 |
| 8/27/2016 | Tahoe Rim Ride (W) | USEF | 12 | 12 | 0 |
| 8/6/2016 | Colorado Mountain Mettle (MT) | USEF | 10 | 10 | 0 |
| 8/6/2016 | Ride Between the Rivers (NE) | USEF | 12 | 12 | 0 |
| 7/16/2016 | Big Horn (MT) | USEF | 12 | 12 | 0 |
| 6/25/2016 | NASTR (W) | USEF | 12 | 12 | 0 |
| 5/14/2016 | Last Hoorah! (CT) | USEF | 12 | 12 | 0 |
| 3/13/2016 | Old Pueblo Pioneer (SW | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/14/2015 | Lead Follow at McDowell Mtn. Park (SW) | USEF | 12 | 12 | 0 |
| 10/10/2015 | Owyhee Canyonlands (NW) | USEF | 12 | 11 | 1 |
| 9/19-20/2015 | Virginia City 100 (W) | USEF | 12 | 12 | 0 |
| 8/29/2015 | Iron Mountain Jubilee (NE) | USEF | 12 | 12 | 0 |
| 8/5/2015 | Shore to Shore Pioneer II (MW) | USEF | 12 | 12 | 0 |
| 7/3/2015 | Shamrock Pioneer (MT) | USEF | 12 | 12 | 0 |
| 5/1/2015 | Biltmore Challenge (SE) | USEF | 12 | 12 | 0 |
| 4/25/2015 | Spirit of Texas (CT) | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/1/2014 | AERC National Championship 50 (CT) | USEF | 19 | 19 | 0 |
| 10/30/2014 | AERC National Championship 100 (CT) | USEF | 5 | 4 | 1 |
| 10/4/2014 | Man vs. Horse (SW) | USEF | 12 | 11 | 1 |
| 10/4/2014 | Jubilee Ranch Ride (NW) | USEF | 12 | 12 | 0 |
| 10/2/2014 | Alabama Yellowhammer (SE) | USEF | 12 | 12 | 0 |
| 7/4-6/2014 | Shamrock Pioneer Ride (MT) | USEF | 12 | 12 | 0 |
| 5/24-25/2014 | Jo Tate Memorial Ride (CT) | USEF | 12 | 12 | 0 |
| 5/4/2014 | White River Spring (MT) | USEF | 6 | 6 | 0 |
| 4/12/2014 | Foxcatcher (NE) | USEF | 12 | 12 | 0 |
| 4/5/2014 | McCulley Farms (SE) | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/16/2013 | Lead Follow or Get Out of My Way (SW) | USEF | 10 | 10 | 0 |
| 11/9/2013 | Mustang Memorial (NE) | USEF | 12 | 12 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/17/2012 | Lead Follow or Get Out of My Way (SW) | USEF | 8 | 8 | 0 |
| 9/22/2012 | Adequan® AERC National Championships (SE) | USEF | 16 | 16 | 0 |
| 9/2/2012 | Kanopolis Canyon (CT) | USEF | 7 | 7 | 0 |
| 8/18/2012 | Leatherwood Ride (SE) | USEF | 8 | 8 | 0 |
| 8/5/2012 | Pink Flamingo Classic (NW) | USEF | 8 | 8 | 0 |
| 7/29/2012 | Salamonie Stomp II (MW) | USEF | 4 | 4 | 0 |
| 7/28/2012 | Sangre Scenic Pioneer (MT) | USEF | 8 | 8 | 0 |
| 7/14/2012 | Mosquito Run (MW) | USEF | 8 | 8 | 0 |
| 6/23/2012 | Brushy Creek (MW) | USEF | 8 | 8 | 0 |
| 6/9/2012 | Double Eagle Dance (CT) | USEF | 8 | 8 | 0 |
| 6/9/2012 | Old Dominion (NE) | USEF | 8 | 8 | 0 |
| 5/5/2012 | MNDRA I (MW) | USEF | 8 | 8 | 0 |
| 4/28/2012 | Old Dominion (NE) | USEF | 8 | 8 | 0 |
| 3/31/2012 | Home on the Range (NW) | USEF | 8 | 8 | 0 |
| 2/19/2012 | Racing Stripes (CT) | USEF | 8 | 7 | 1 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/30/2011 | Season Finale (CT) | USEF | 8 | 8 | 0 |
| 11/29/2011 | Greenway Getaway Endurance Ride (SE) | USEF | 8 | 8 | 0 |
| 10/29/2011 | Owyhee Hallowed Weenies (NW) | USEF | 7 | 7 | 0 |
| 10/15/2011 | Foothills of the Cascades (NW) | USEF | 8 | 8 | 0 |
| 10/15/2011 | Armadillo (CT) | USEF | 7 | 7 | 0 |
| 10/1/2011 | Alleghany Shut Up and Ride (NE) | USEF | 6 | 6 | 0 |
| 10/1/2011 | Man vs. Horse (SW) | USEF | 8 | 8 | 0 |
| 9/17/2011 | Cracked OAATS Crunch (NE) | USEF | 8 | 7 | 1 |
| 9/17/2011 | Tin Cup Springs (MW) | USEF | 8 | 8 | 0 |
| 9/16/2011 | Sangre Scenic Fall Pioneer (MT) | USEF | 5 | 5 | 0 |
| 8/25/2011 | AERC National Championships 100 (SW) | USEF | 7 | 7 | 0 |
| 8/20/2011 | AERC Region 11 End. Champs/River Rock Charity (MW) | USEF | 6 | 6 | 0 |
| 7/30/2011 | Fort Meade Remount (MT) | USEF | 8 | 8 | 0 |
| 5/29/2011 | Old Glory (CT) | USEF | 8 | 8 | 0 |
| 5/21/2011 | Mt. Adams (NW) | USEF | 14 | 14 | 0 |
| 5/21/2011 | Run for the Border (MW) | USEF | 8 | 8 | 0 |
| 5/7/2011 | Red Hills Ride (MT) | USEF | 8 | 8 | 0 |
| 4/9/2011 | Old Dominion No Frills (NE) | USEF | 8 | 8 | 0 |
| 3/26/2011 | Home on the Range (NW) | USEF | 8 | 8 | 0 |
| 3/25/2011 | Red Barn Run (SE) | USEF | 8 | 8 | 0 |
| 2/19/2011 | Far Out Forest (SE) | USEF | 5 | 5 | 0 |
| 2/9/2011 | Springdale Romp II (SW) | USEF | 7 | 7 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 5/30/10 | Wyoming Pioneer II (MT) | USEF | 9 | 9 | 0 |
| 4/17/10 | Grizzly Mountain (NW) | USEF | 8 | 8 | 0 |
| 4/10/10 | City Slickers Goes Country (SW) | USEF | 7 | 7 | 0 |
| 3/28/10 | Rabbit Run (NE) | USEF | 8 | 8 | 0 |
| 1/17/10 | Gator Run Pioneer (SE) | USEF | 8 | 8 | 0 |
| 1/3-5/10 | High Roller (CT) | USEF | 8 | 8 | 0 |
| 12/6/09 | Las Cienega Pioneer (SW) | USEF | 8 | 8 | 0 |
| Ride Date | Ride Name | Testing Agency | # Tested | Negative | Positive |
| 11/21/09 | Kentucky Diehards II (SE) | USEF | 8 | 8 | 0 |
| 11/14-15/09 | Mustang Memorial (NE) | USEF | 9 | 9 | 0 |
| 11/7/09 | Sandhills Stampede (SE) | USEF | 7 | 7 | 0 |
| 11/7/09 | Cave Country Canter I (NW) | USEF | 8 | 8 | 0 |
| 11/7/09 | Off Road Warrior I & II (CT) | USEF | 8 | 8 | 0 |
| 10/24/09 | Dust Devil Endurance Ride (NW) | USEF | 8 | 8 | 0 |
| 10/23/09 | Fort Valley I & II Endurance Ride (NE) | USEF | 5 | 5 | 0 |
| 9/12/09 | Big South Fork (SE) | USEF | 6 | 6 | 0 |
| 9/10-13/09 | AERC National Championship (W) | USEF | 8 | 8 | 0 |
| 9/12/09 | Westbank Rocker (NW) | CanTest | 4 | 4 | 0 |
| 7/24-25/09 | Wildcat Rides (MW) | USEF | 8 | 8 | 0 |
| 6/17-21/09 | Hickory Creek (NE) | USEF | 7 | 7 | 0 |
| 6/6-7/09 | Ft. Howes (MT) | USEF | 8 | 8 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 10/18/08 | AERC National Championship 50 | M. Fehrs | 4 | 4 | 0 |
| 10/16/08 | AERC National Championship 100 | D. Huff | 4 | 4 | 0 |
| 10/4/08 | Comstock 50 | J. White | 3 | 3 | 0 |
| 10/4/08 | Man Against Horse | E. Espinosa | 4 | 4 | 0 |
| 9/6-7/08 | Big South Fork | D. Barnett | 4 | 4 | 0 |
| 8/3/08 | Old Selam | O. Balch | 4 | 4 | 0 |
| 8/30/08 | Unicorn Hunt I | S. Van Wagner | 5 | 5 | 0 |
| 8/3/08 | Rocky Mountain Challenge | K. Vanderwekken | 4 | 4 | 0 |
| 7/19/08 | Bandit Springs | C. Terry | 4 | 4 | 0 |
| 7/19/08 | Big Horn 100 | I. Weese | 4 | 4 | 0 |
| 6/28/08 | Devil Dog | E. Espinosa | 3 | 3 | 0 |
| 6/28/08 | Dayton 50 | J.A. White | 4 | 4 | 0 |
| 5/3/08 | Biltmore 50/100 | D. Barnett | 5 | 5 | 0 |
| 5/3/08 | Red Hills | I. Weese | 4 | 4 | 0 |
| 5/3/08 | White River Spring 50 | M. Fehrs | 4 | 4 | 0 |
| 4/19/08 | Grizzly Mountain | M. Foss | 4 | 4 | 0 |
| 4/19/08 | Million Pines | O. Schmitt | 5 | 5 | 0 |
| 4/13/08 | Color Country | D. Nicholson | 4 | 4 | 0 |
| 3/8/08 | Old Pueblo | E. Espinosa | 4 | 4 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 11/11/07 | Road Warrior II | C. Hounsel | 6 | 6 | 0 |
| 11/10/07 | Mustang Memorial 50 | F. Gorra | 5 | 5 | 0 |
| 10/27/07 | AHDRA III | G. Irwin | 4 | 4 | 0 |
| 10/27/07 | Spook Run | D. Huff | 4 | 4 | 0 |
| 10/21/07 | High Desert-Fort Churchill 50 | J. Clemitson | 4 | 4 | 0 |
| 10/6/07 | Man Against Horse | E. Espinosa | 4 | 4 | 0 |
| 9/15/07 | Pioneer Cabin | G. Cook | 3 | 2 | 1 |
| 9/15/07 | Movin On Up | M. Brosnahan | 5 | 5 | 0 |
| 9/2/07 | Great Santa Fe Trail Endurance Ride | L. Nolen | 3 | 3 | 0 |
| 8/25/07 | AERC National Championship 100 | R. Washington | 3 | 3 | 0 |
| 8/25/07 | Colorado Horse Park Challenge | G. Goonan | 3 | 3 | 0 |
| 8/25/07 | Northern Highland | G. Schland | 3 | 3 | 0 |
| 6/29/07 | Bare Bones | L. Hanelt | 4 | 4 | 0 |
| 6/29/07 | Leatherwood | R. Whaley | 4 | 4 | 0 |
| 6/23/07 | Derby Dash | D. Huff | 4 | 4 | 0 |
| 6/23/07 | Sunriver 100 | R. Root | 4 | 4 | 0 |
| 6/9/07 | Pyramid Challenge | D. Huff | 4 | 4 | 0 |
| 5/26/07 | Owyhee 100 | R. Root | 4 | 4 | 0 |
| 5/5/07 | Biltmore | L. Johnson/D. Barnett | 2 | 2 | 0 |
| 4/21/07 | Huntersville Spring Fling | R. Teal | 4 | 4 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 10/28/06 | Dust Devil | K. Jernstedt | 4 | 4 | 0 |
| 10/22/06 | National Championship 50 | J. Watkins | 5 | 5 | 0 |
| 10/20-21/06 | National Championship 100 | S. Eichelberger | 5 | 5 | 0 |
| 8/5/06 | Western States Trail Ride (Tevis Cup) 100 | N/A | N/A | N/A | 1 |
| 3/25/06 | Home on the Range | M. Foss | 2 | 2 | 0 |
| 3/3/06, 3/5/06 | Fun in the Sun #1 and #3 | J. Baldwin | 4 | 4 | 0 |
| 1/22/06 | Louisiana Gumbo Ride | L. Reznicek | 3 | 3 | 0 |
| 1/14-15/06 | Gator Run | D. Shearer | 4 | 4 | 0 |
| 12/31/05 | High Roller Ride | D. Seymore | 2 | 2 | 0 |
| 12/12/05 | Sunflower Classic | T. Holbrook | 2 | 2 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 10/6-8/05 | Alabama Yellowhammer I, II, III | O. Schmitt | 6 | 6 | 0 |
| 9/25/05 | Kentucky Stampede II | O. Schmitt | 2 | 2 | 0 |
| 9/25/05 | Heart of Gold | A. Christopherson | 2 | 2 | 0 |
| 9/24/05 | Kentucky Stampede I | O. Schmitt | 2 | 2 | 0 |
| 9/17/05 | Movin On Up | D. Seymore | 2 | 2 | 0 |
| 9/17/05 | PacNorth Fundraiser I AERC Ride | B. Yatvin | 3 | 3 | 0 |
| 9/10/05 | Big South Fork II | O. Schmitt | 2 | 2 | 0 |
| 9/9/05 | Big South Fork I | O. Schmitt | 2 | 2 | 0 |
| 9/4/05 | Tall Pines Ride | L. Locklar | 2 | 2 | 0 |
| 8/27/05 | Headwaters of the Rogue | T. Timmons | 5 | 5 | 0 |
| 8/27/05 | Northern Highland Ride, Day 1 | D. Bloomquist | 2 | 2 | 0 |
| 8/13/05 | Colfax Coal Rush, Day 3 | J. Davis | 2 | 2 | 0 |
| 7/31/05 | V-Bar | J. Davis | 2 | 2 | 0 |
| 7/2/05 | Pacific Crest | A. Hills | 2 | 2 | 0 |
| 6/26/05 | Blackjack 50 | S. McCartney | 4 | 4 | 0 |
| 6/26/05 | Midsummer Night’s Madness | J. Baldwin | 2 | 2 | 0 |
| 6/18-19/05 | Hopkins Creek | M. Robinson | 2 | 2 | 0 |
| 6/12/05 | AERC 50 Mile National Championships | J. Baldwin | 5 | 5 | 0 |
| 6/10/05 | AERC 100 Mile National Championships | J. Baldwin | 5 | 5 | 0 |
| 6/4/05 | Top of the Rock | M. Habel | 2 | 2 | 0 |
| 5/21/05 | Scioto Run and Biannual Trailer Pull | M. Fehrs | 5 | 5 | 0 |
| 5/14-15/05 | Roundup Rendezvous | R. Randall | 4 | 4 | 0 |
| 5/14/05 | Panther Creek Hustle | D. Frazier | 2 | 2 | 0 |
| 5/14/05 | Prineville | M. Foss | 2 | 2 | 0 |
| 5/7/05 | Biltmore Estate Challenge | K. Marcella | 3 | 3 | 0 |
| 5/7/05 | Red Hills Endurance Ride | Bischoff | 2 | 2 | 0 |
| 4/24/05 | Antelope Island Endurance Ride | Simper | 2 | 2 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 11/27/04 | Jaguar II Ride | Zarges | 2 | 2 | 0 |
| 11/23/04 | Paso Del Norte | Zarges | 2 | 2 | 0 |
| 11/13-14/04 | Mustang Memorial I & II | Kohut | 2 | 2 | 0 |
| 11/13/04 | Dust Devils Endurance Ride | Foss | 2 | 2 | 0 |
| 11/6/04 | Smokey Killen Memorial Pioneer Day 2 | McCartney | 3 | 3 | 0 |
| 10/23/04 | Paso Del Norte | Zarges | 2 | 2 | 0 |
| 10/14/04 | Point Chaser XVIII | Eller-Medina | 2 | 2 | 0 |
| 10/2/04 | Indian Territory Endurance Ride | Selkf | 2 | 2 | 0 |
| 10/2/04 | Man vs. Horse | Dunn | 2 | 2 | 0 |
| 10/2/04 | 15th Annual Comstock Arabian Ride | McCartney | 2 | 2 | 0 |
| 9/25/04 | Doncaster Renegade | Kohut | 3 | 3 | 0 |
| 9/18/04 | Virginia City 100 | McCartney | 2 | 2 | 0 |
| 9/18/04 | Old Selam | Metcalf | 2 | 2 | 0 |
| 9/18/04 | Colorama 100 | Beecher | 2 | 2 | 0 |
| 9/11/04 | Allegany Shut Up and Ride | Alkemade | 5 | 5 | 0 |
| 9/6/04 | Owyhee Pioneer High Armory Day 3 | Metcalf | 2 | 2 | 0 |
| 9/5/04 | Colorado Horse Park Challenge | Jung | 4 | 4 | 0 |
| 8/28/04 | Arabian Nights 100 Mile Endurance Ride | Foss | 4 | 4 | 0 |
| 8/14-15/04 | Northeast Challenge 50/50 | McLean | 4 | 4 | 0 |
| 8/15/04 | V-Bar Endurance Ride | Jung | 5 | 5 | 0 |
| 8/14/04 | Santiam Cascade Endurance Ride | Foss | 4 | 4 | 0 |
| 8/10/04 | Shore to Shore Day 2 South Branch | Mayer | 3 | 3 | 0 |
| 8/7/04 | Show Me The Money | Beecher | 5 | 5 | 0 |
| 8/2/04 | Canadian Championship & National Championship 50 | Baldwin | 2 | 1 | 1 |
| 7/29/04 | Spirit Mountain | Christopherson | 3 | 3 | 0 |
| 7/24/04 | Chimney Butte 50 | Baldwin | 2 | 2 | 0 |
| 6/12-13/04 | Old Dominion 50 | Kohut | 5 | 5 | 0 |
| 5/29/04 | Michaux Madness 25/50 | Eichelberger | 3 | 3 | 0 |
| 4/10/04 | No Hands Roller Coaster | Self | 2 | 2 | 0 |
| 3/6/04 | Louisiana Gumbo | Conway | 5 | 5 | 0 |
| 1/17/04 | El Paso-Las Cruces | Fleming | 3 | 3 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 11/15/03 | Mustang Memorial | Kohut | 5 | 5 | 0 |
| 10/25/03 | Owyhee Canyonlands | Fleming | 5 | 5 | 0 |
| 10/18/03 | Fair Hill International | Kohut | 5 | 5 | 0 |
| 10/12/03 | AERC National Championship 50 | Barnett | 8 | 8 | 0 |
| 10/10/03 | AERC National Championship 100 | Barnett | 5 | 5 | 0 |
| 9/20/03 | Fort Laramie | Fleming | 3 | 3 | 0 |
| 8/13/03 | Shore to Shore | Fleming | 5 | 5 | 0 |
| 8/9/03 | Unicorn Hunt Ride | Conway | 5 | 5 | 0 |
| 7/26/03 | Chimney Butte Ride | Fleming | 3 | 3 | 0 |
| 5/24/03 | Grand Island | Christopherson | 7 | 7 | 0 |
| 5/24/03 | Black Hills I | Fleming | 5 | 5 | 0 |
| 4/26/03 | LBL Express | Barnett | 6 | 6 | 0 |
| 4/5/03 | Gamblers Special I | Fleming | 5 | 5 | 0 |
| Ride Date | Ride Name | Veterinarian | # Tested | Negative | Positive |
| 11/02/02 | Hungry Buzzard | Barnett | 5 | 5 | 0 |
| 10/26/02 | Glass Mountain II | Conway | 5 | 5 | 0 |
| 10/25/02 | Owyhee Canyonlands | Fleming | 5 | 5 | 0 |
| 10/19/02 | Armadillo | Conway | 5 | 5 | 0 |
| 10/02/02 | AERC National Championship | Conway | 10 | 10 | 0 |
| 9/14/02 | Old Selam | Yatvin | 4 | 4 | 0 |
| 9/7/02 | Big South Fork | Barnett | 5 | 5 | 0 |
| 8/31/02 | Charity Cup | Christopherson | 5 | 5 | 0 |
| 8/11/02 | Northeast Challenge | King | 5 | 5 | 0 |
| 7/22/02 | Colfax Coal Rush | Conway | 5 | 5 | 0 |
Results of drug tests will be published in Endurance News as soon as they are reported to the national office.
Note: The State of California and Canadian rides are tested independently and those drug test results are not included.
