Introduction
Mount Whitney at 14,505 feet is the highest peak in the contiguous United States, and the Mount Whitney Trail is the most accessible route to its summit. Every year, tens of thousands of hikers attempt to win a permit through the lottery system; thousands more succeed in completing the 22-mile round trip on a single day hike. It's long, high, and physically demanding — but the trail is well-maintained and the route is non-technical, making it achievable for fit, prepared hikers.
The Permit System
A permit is required for overnight travel in the Mount Whitney Zone and for day hikers departing from Whitney Portal during the quota season (May 1 – November 1). The permit lottery opens on February 1 each year through recreation.gov — this is when most permits are awarded. Lottery results are announced in mid-February. Remaining permits are released daily starting May 1 as walk-ups; check the recreation.gov availability calendar frequently. Day hiking permits are separate from overnight permits and are also quota-controlled.
The Route
Whitney Portal to Trail Camp (6 miles, 3,600 feet gain): From the trailhead at 8,374 feet, the trail climbs steadily through pine forest, past Lone Pine Lake, to Outpost Camp (3.8 miles) and then Trail Camp at 12,039 feet. Trail Camp is the last reliable water source and a popular overnight spot.
Trail Camp to Summit (5 miles, 2,400 feet gain): The famous 97 switchbacks climb the rocky headwall from Trail Camp to Trail Crest at 13,600 feet. From Trail Crest, a 2-mile ridge walk leads to the summit hut and the highest point in the lower 48. The views on a clear day extend to Nevada and beyond.
Day Hike Strategy
Most day hikers start at 2–3am to reach the summit by 10–11am and descend before afternoon thunderstorms. The 22 miles and 6,100 feet gain in a single push requires exceptional fitness. A realistic time is 12–16 hours round trip. Running the route is possible for fit trail runners (fast times are under 4 hours). Most hikers find an overnight at Trail Camp makes the summit more enjoyable.
Acclimatization
Altitude sickness is the biggest risk on Whitney. If you're coming from sea level, spend at least one night in Lone Pine (3,700 feet) and ideally a second night at the Whitney Portal Campground (8,374 feet) before your summit day. Symptoms of altitude sickness include headache, nausea, fatigue, and loss of appetite. If symptoms worsen, descend immediately.
Gear Essentials
Microspikes are often required on the switchbacks through July. Trekking poles reduce knee strain on the descent. Sunscreen, sunglasses, and a wide-brim hat are essential at altitude. Bring warm layers — the summit is routinely below 40°F even in summer. Hydrate aggressively — drink at least 4 liters during the hike.
