Oatfield Raceway / AMP-GFI Motocross

Oatfield Raceway in Snelling is the home of GFI Racing, one of the longest-running amateur motocross series in Northern California. The property is built on the same adobe clay and silt that makes Argyll famous, and race-day prep draws GFI series riders from across the state. The adobe clay and silt soil composition is the property's defining feature. That soil holds racing lines through long sessions and delivers the tacky cornering surface that race programming requires. Most California tracks use sand or loam composites; the adobe clay base at Oatfield is the surface profile that race directors prep specifically for series weekends. Operating structure is series-first. Most days on the calendar are race-prep and series-event sessions, not open practice for casual drop-in. That's the operational reality to understand before driving up. AMP/GFI Motocross operates the facility on a calendar built around the regional racing schedule. For local riders in Merced County and the broader central California Sierra foothills region, Oatfield is the closest GFI series host venue. Modesto riders make the trip east, about an hour out. Fresno, Sacramento, and Bay Area riders drive in for series weekends specifically. The Snelling location is in Merced County in the Sierra foothills, accessible from Highway 99 and the J-59 corridor. For series-focused riders building toward GFI championship weekends, Oatfield is the home track. For casual practice riders, the calendar windows are limited. Best to check ampgfimx.com for the race calendar before driving. Most days are race-prep, not open practice, so verifying current scheduled access matters before loading the truck.