Grassroots Off-Road Challenge
Six-round Grand Prix-style series run by Grassroots Promotions/Grassroots MX (same promoter as the sibling motocross-only RMX Series) across Arizona, Idaho and Utah, presented by title sponsor MSR and Rocky Mountain ATV/MC. Each round combines the host venue's full motocross track with 4-6 miles of prepped off-road course. Rounds 1-3 are the regular season; Rounds 3-6 are double-points 'Playoff' rounds, with Round 3 (Sat) and Round 4 (Sun) forming the back-to-back 'Dynamite Grand Prix' doubleheader weekend at Cache Valley MX. Round 1/6's promoted 'Mesquite, NV' branding sits directly on the AZ/NV line; the venue's street address is in Littlefield, AZ. It is a self-contained 6-round points championship with its own results/points table (resultsmx.com) and AMA #1 series plates. Some listings print a different 'Round N' on these same events, counting through Grassroots MX's whole combined Western calendar (Moto86 Series, RMX Series, Grassroots Off-Road, Loretta Lynn area qualifiers and standalone signature races like the AMA Thanksgiving Classic all together); those numbers are not this series' round order.
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