Rafferty Pass
Peak · 10,512 ft · Yosemite corridor
Rafferty Pass, a 10,512-foot Sierra crest crossing in Yosemite's backcountry, sits at the convergence of Lyell Canyon and the high plateau. Wind-exposed and snow-dependent, it demands precise timing.
Wind funnels consistently across the pass; the 30-day average of 12 mph masks afternoon gusts that spike well above that baseline. Morning calm windows close by mid-day. Snowpack stability and visibility dominate spring and early summer access; bare rock and exposure characterize late summer crossings.
Over the last 30 days, Rafferty Pass averaged a NoGo Score of 32, with temperatures holding around 24 degrees Fahrenheit and wind averaging 12 mph. The week ahead will show how spring snowmelt, afternoon thermal wind, and crowding stack against your window. Monitor the chart for morning calm pockets and temperature swings that signal avalanche risk shifts.
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About Rafferty Pass
Rafferty Pass sits on the eastern rim of Yosemite's high Sierra, straddling the boundary between the Lyell Canyon drainage and the Mono Basin plateau at 10,512 feet. Primary access is via Highway 120 through Tioga Pass to the Mono Lake area, then overland via the Mono Pass or Lyell Canyon trail systems; the nearest trailheads lie near Lee Vining and Tuolumne Meadows. The Yosemite corridor access requires either a long day hike or backpack from the west side (Tuolumne Meadows) or approach from the Mono Basin to the east. Elevation gain and snow persistence make this a late-spring-to-early-fall objective for most parties.
Rafferty Pass sits in high-Alpine terrain where snowpack typically persists into mid-summer. The 30-day average temperature of 24 degrees reflects the current spring window; expect freezing overnight lows and variable daytime thaw cycles. Wind averages 12 mph over the rolling 30-day window but regularly gusts to 33 mph or higher in afternoon hours, especially when thermal convection peaks. Crowding has remained light (3.0 average on the rolling metric), but the number climbs sharply once Highway 120 opens fully and snowmelt clears the high passes. Early morning and late-season visits see the fewest parties; mid-July through August draws weekend traffic from both sides of the Sierra.
Rafferty Pass suits experienced backpackers and peak baggers comfortable with snow travel, navigation on exposed high terrain, and self-rescue. Parties typically plan around avalanche hazard in spring, corniced ridges, and afternoon wind that can pin exposed hikers in place. The pass itself is not a technical climb but demands good snow sense and respect for crevasse fields in wet seasons. Expect to move quickly in early mornings; afternoon wind can turn a straightforward crossing into a punishing slog. Winter and early-spring parties must assess slab stability and have deep mountain experience; SAC avalanche bulletins are essential.
Lyell Canyon to the west and the Mono Pass approach to the east offer alternative routes into the same high-Sierra ecosystem. For hikers seeking lower-elevation, less-exposed scrambles, Mono Pass (10,604 feet) lies a short distance south and sits slightly lower. The Cathedral Range and Cockscomb Ridge dominate the western skyline and draw peak-baggers; they sit at similar elevations but lie further from the Rafferty Pass corridor. Parties planning multi-day traverses often link Rafferty with Mono Pass or Tioga Pass as part of a longer Sierra crest route.