VERMILLION
Campground · Mammoth Lakes corridor
Vermillion campground sits at 7,726 feet in the Mammoth Lakes corridor, a high-Sierra base camp with reliable shoulder-season access. Calmer than the open lake basins just east, it anchors the eastern approach to the Sierra crest.
Morning calm gives way to afternoon wind funneling off the high country by mid-day. The 30-day average wind of 8 mph masks daily swings from flat to gusty. Skip mid-afternoon if you're sensitive to exposure; head here on early mornings or after the wind drops in early evening.
Over the last 30 days, Vermillion averaged a NoGo Score of 14.0 with temperatures holding at 36 degrees and wind at 8 mph, typical for early season at this elevation. The week ahead will track that pattern: morning windows remain playable, afternoon gusts remain the constraint. Watch for the max wind peak mid-day and plan activities accordingly.
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About VERMILLION
Vermillion is a high-elevation campground at 7,726 feet on the eastern side of the Sierra, part of the Mammoth Lakes corridor that drains the crest toward the Owens Valley. Access is via Highway 395 from the south (Mammoth Lakes town, 10 miles south) or north (June Lake Loop and Lee Vining, both 30 to 40 miles). The location sits on the dry eastern slope, making it a reliable early and late-season staging point when western-side roads are still snow-bound. Vermillion is positioned to catch the tail of the Sierra Nevada's rain shadow; precipitation here is sparse and wind is a year-round player.
Weather and crowds follow tight seasonal arcs at this elevation. Winter and early spring bring snow that can close or delay access; by late spring, the site opens as snow retreats off the surrounding peaks and Highway 395 stays clear year-round. Summer (late June through August) is warm and dry, with daytime highs in the upper 50s to mid-60s and strong afternoon wind off the crest. The 30-day average temperature of 36 degrees reflects late April conditions; expect a 20-degree swing between now and midsummer. Crowding averages 8 out of 10 during peak weekends and drops sharply in shoulder months. Wind peaks in late afternoon and early evening; the 30-day max of 20 mph is typical for the time of year but can gust higher during strong flow days.
Vermillion suits climbers, mountaineers, and backcountry skiers staging for Sierra crossings and peak ascents. Car campers use it as a stable base for day trips into the high country. The campground offers water and facilities; sites fill quickly on weekends and during school holidays. Expect limited shade, afternoon wind as your constant variable, and rapid temperature drop after sunset. Experienced visitors target Tuesday through Thursday for thinner crowds and calmer mornings; weekends book solid from late May onward. Bring layers; the 30-day minimum temperature of 21 degrees can occur on clear nights even in summer.
Nearby alternatives include June Lake, a milder lower-elevation option 30 to 40 miles northwest, and Walker Lake, a windy but scenic basin 50 miles south. The Mammoth Lakes basin itself, directly west across the crest, sits sheltered from the afternoon easterly push and is warmer and more crowded. Vermillion's advantage is its direct highway access, its position as a true high-Sierra anchor, and its role as the quickest launch for climbing and ski touring on the crest proper. Plan around afternoon wind and you'll find reliable conditions; ignore it and you'll fight the entire user base that learned the same lesson.