The WYO131 Gravel Grinder is the ultimate Wyoming cycling experience, held annually the second weekend in September. Courses weave through the red desert and historic mining towns. Participants follow the tracks of the Oregon Trail up to South Pass and Atlantic City, across to Louis Lake Road, through forests and along a lake, and through Sinks Canyon State Park. Riders end back in Lander for an afterparty sponsored by Melvin Brewing Company. Friday, September 8: Bike and Beer Social at…