Grab your mountain bike and a headlamp for a 20-mile trail ride including the 2-mile historic (and totally dark) Snoqualmie Tunnel with Mountains to Sound Greenway on June 29. Bikers meet at 8:30 a.m. at Rattlesnake Lake to catch a shuttle to Snoqualmie Pass for the mostly downhill ride on packed gravel with stops to learn about local history and ecology, ending with a post-ride barbecue. Preregistration is required, $25; Discover Pass needed for vehicle parking at starting point (