Obsidian Dome is a geology nerd’s dream. Nerd fact number one: The eruption date for the area around Obsidian Dome is one of the best estimated eruption dates in the prehistoric period on the planet.
Mammoth Scenic Loop
Winter Hiking & Snowshoeing
If you’re not into sliding down hills wearing two planks (or one, if you’re a snowboarder), there’s still plenty to do in the Eastern Sierra in the wintertime, whether you prefer getting your hiking boots on solid dirt or are into the awesome exercise of cross-country skiing (only recently did I realize that a NordicTrack mimics the whole-body workout of this activity).