- AMA District 37– Southern California’s Sister to District 36
- MRANN– Motorcycle Racing Association of Northern Nevada
- OMRA– Oregon Motorcycle Riders Association
- NMA– Northwestern Motorcycle Association (WA)
- SIDRA– South Western Idaho Desert Racing Association
- MRAN– Motorcycle Racing Association of Nevada
- WORCS – Worcs Racing
- SCORE– Score International Off-Road Racing (NV and Baja Mexico)
- RMEC– Rocky Mountain Enduro Circuit (AZ, CO, NM, TX, WY)
- TSCEC– Texas State Championship Enduro Circuit
- TXORR– Texas Extreme Off Road Racing
- TCCRA– Texas Cross Country Racing Association (North Central TX)
- OCCRA– Oaklahoma Cross Country Racing Association
- AHSCS– Arkansas Hare Scramble Championship Series
- GNCC– Grand National Cross Country Series (Eastern Region)
- SETRA– Southeastern Enduro & Trail Riders Association (NC, SC, GA, AL, FL)
- NETRA– New England Trail Riders Association (RI, CT, MA, NH, NY)
- ECEA– East Coast Enduro Association (DE, NJ, MD, NY, RI, PA)
- Sacramento PITS, Inc. – AMA Nor Cal Observed Trails