Mariuolumne Dome

Mariolumne Dome earns its odd name honestly: it sits almost exactly on the line between Mariposa and Tuolumne counties, and someone mashed the two together. At 9,970 feet, it's the tallest dome in the Tuolumne Meadows area, rising roughly 700 feet of bare granite above the surrounding terrain — enough to rank second locally only to Fairview Dome. Unlike the trails closer to Yosemite Valley, this one stays quiet.

Reaching the Summit

There's no maintained trail to the top. The east side is an easy Class 2 scramble — a mix of use trail and cross-country travel over granite slabs — that a fit, sure-footed hiker can manage without ropes. From the summit, the view opens up to Cathedral Peak, Tenaya Lake, and the surrounding dome country. With no signage or defined path, this suits hikers already comfortable with off-trail route-finding better than a casual first outing.

Rock Climbing

Mariolumne Dome is better known among climbers than hikers. Its granite splits into four distinct climbing areas — the North Wall, West Wall, Right Side, and Lost Wall — with the classic 5.7 Hobbit Book and Serrated Edge among the routes most parties come for. Approaches typically run past neighboring Drug Dome, and the Right Side/Lost Wall routes climb a gully that tops out at a small tarn climbers call the Lake of the Domes.

Getting There

The dome sits in the Tuolumne Meadows high country, reached via Tioga Road (Highway 120) from either the west end of the park or Tioga Pass on the east side. Tioga Road closes seasonally with snow, so both the hiking scramble and the climbing routes are realistically a late-spring-through-fall proposition.