Usually considered a culinary wasteland, a recent trip to Mammoth showed some credible possibilities. Since we were there in the down season midweek many places were not open but passing on the local buzz to give some new places and/or new chefs a try:
In the Mammonth Village complex: Campo - billed as rustic Italian
Twin Lakes: The Mountain Inn at Tammarack Lodge - new chef, new menu, wonderful old log cabin lodge setting
Skadi - Old Mammoth Road got peer recommendations from local chefs
Did try and was pleased: The Restaurant at Convict Lake, and The Smokehouse in the Mammoth Village complex.