Layton Springs (warmish), 20 miles
Crowley Lake, Owens River, natural hot springs along Benton Crossing Road (30-50 minutes)
Fault line along Highway 203 Mammoth Lakes
Devil's Postpile, Red's Meadows, (75minutes)
Mammoth Mountain Ski Area, mountain biking in summer (75 minutes)
Center of Mammoth Lakes Town:
Mammoth Rock & Bowl, with good food, 3029 Chateau Road