Lick Observatory , Mount Hamilton, CA

Lick Observatory atop Mount Hamilton is closed. A series of ferocious storms, culminating in 114 mph wind gusts, ripped sections of the roof right off the historic domes in 2025.

Mount Hamilton Rd / Highway 130 is a rite of passage for any Bay Area rider (& bicyclist) . Departing from the urban sprawl of the South Bay, the asphalt immediately transforms into a relentless, 19-mile staircase of over 360 curves. This isn't a high-speed sweeper ride; it is a technical, low-gear workout that demands total focus as you climb toward the 4,265-ft summit of the Diablo Range.

At the top sits the Lick Observatory, which has weathered the elements since 1888. However, the facility and the parking lot remain closed as repairs continue. In late 2025, a winter wind storm shredded the heavy protective lead sheathing and tore a section of the roof off the 120-inch Shane Telescope dome. That 114 mph gust was the strongest ever recorded in the observatory's 138-year history.

Mount Hamilton Road has guardrails, but many turns feature steep drop-offs and zero shoulder, tempting you to peek over the edge. Keep your eyes front and focus on the next turn. On clear days, the reward is an unparalleled panoramic view stretching from the Sierra Nevada to the Pacific. On exceptionally clear days, glimpses toward San Francisco and the Peninsula ridgelines are even possible.

Due to the closure, felt like a lot less traffic headed for the summit—it felt like I had the mountain to myself when I rode it for the umpteenth time yesterday. The road is as fun as ever, and the best way home is to drop down the backside and connect to Mines Road for the long, winding run back into Livermore.