Feather Lake Pass
Peak · 10,728 ft · Mammoth Lakes corridor
Feather Lake Pass sits at 10,728 feet in the Mammoth Lakes corridor, a high-Sierra crossing exposed to afternoon wind and avalanche terrain. Access is typically via the Mammoth Lakes area on Highway 395.
Wind accelerates off the lake basin by mid-afternoon, funneling across the pass. Morning calm gives way to 15 to 20 mph gusts by late day. Snowpack persists into late spring; assess slab stability before crossing avalanche gullies. Temperature swings 30 degrees between dawn and afternoon.
Over the last 30 days, Feather Lake Pass averaged a NoGo Score of 36.0 with average wind of 9 mph and temperatures near 33 degrees Fahrenheit. The week ahead shows typical spring volatility: morning windows are rare, afternoon deterioration is reliable, and wet-snow instability peaks mid-day on warming slopes. Plan for early starts and expect crowding to jump after 10 am on weekends.
30 days back / 7 days forward
Today's score by factor
About Feather Lake Pass
Feather Lake Pass is a high-Sierra saddle in the Mammoth Lakes corridor of California's Eastern Sierra, reachable via Highway 395 and secondary roads branching east into the Inyo National Forest. The pass sits at 10,728 feet and serves as a winter crossing and spring ski-approach corridor; most access flows through Mammoth Lakes town, roughly 15 to 20 minutes' drive from the Highway 395 junction. The pass itself is exposed, treeless above timberline, and faces consistent afternoon wind off the lake drainage to the west. Parking is limited and fills by mid-morning on weekends; arrive before 7 am if you're planning to cross or camp.
Feather Lake Pass experiences pronounced diurnal wind and temperature swings typical of high-Sierra passes above 10,000 feet. The 30-day average wind of 9 mph masks strong afternoon acceleration; gusts regularly reach 20 to 24 mph by late afternoon, making the pass calmer and warmer in early morning than at any other time. Winter snowpack retreats slowly at this elevation; stability is poorest in mid-April through May, when solar warming destabilizes wet slabs on south and southwest aspects. The pass is avalanche terrain; the gullies on either flank of the saddle can slide during rapid warming or after new snow. Crowding remains light compared to lower-elevation Mammoth destinations; the 30-day average crowding of 2.0 reflects low base popularity, but weekends spike noticeably. Late spring and autumn see the most reliable weather windows.
Feather Lake Pass suits early-season ski traverses, peak-bagging, and high-Sierra fishing access to the Feather Lake basin. Experienced mountaineers use it as a route into the Ritter Range and Banner Peak cirques. The pass is not ideal for casual day hikers or families; exposure, wind, and avalanche terrain require route-finding skill and winter climbing capability. Bring a probe and shovel in spring; assess snowpack stability before committing to any drainage crossing. Water is abundant from snowmelt and the lake itself, but campsites are sparse and heavily exposed. Those planning summer visits should wait until late July or August, when the snowpack is minimal and afternoon wind is most predictable.
Nearby alternatives in the Mammoth corridor include Tioga Pass and the lower lakes accessed via Horseshoe Lake Road; both are more sheltered and less technical. Tioga Pass sits at similar elevation but is a major highway crossing with much higher traffic and more reliable infrastructure. Hikers seeking a less technical high-Sierra pass experience should consider routes via Duck Lake or Lake George, which sit at lower elevation and have better trail access. For serious backcountry skiers, Feather Lake Pass pairs well with traverses south toward the Minarets or north toward Mount Ritter, but those routes demand winter mountaineering experience and careful avalanche assessment.