Half Dome Permit Guide 2026: Lottery, Cables & Training

How hard is Half Dome, and do you always need a permit?

Half Dome is a very long, strenuous day hike — often 14–16+ miles with roughly 1,450 m of elevation gain from Yosemite Valley when cables are up. A permit is required to ascend the subdome steps and cables during cable season. Without cables, the route is a technical climb outside this guide’s scope.

Most visitors treat Half Dome as a dawn-to-dusk valley day via the Mist Trail or John Muir Trail approach. It is closer in effort to a hard alpine day than to Angels Landing’s short fin. Training, food calories and turnaround times matter as much as winning the lottery.

Cable season is typically late May through mid-October, aligned with the Friday before Memorial Day through the period after Columbus Day / Indigenous Peoples’ Day — exact install and removal dates move with snow and safety. Confirm on NPS Yosemite before you book non-refundable travel.

Compared with Mount Fuji, Half Dome adds distance and granite slab management; compared with Angels Landing, it adds hours and vertical. Neither lottery is a substitute for fitness.

Plan food like an ultra-distance day: breakfast before the trail, snacks every hour, and a real meal after you return. Under-fuelling shows up as clumsy cable footwork. Likewise plan water treatment or carry capacity honestly — filtering from the Merced drainage has rules and contamination realities you must respect.

Valley lodging is part of the permit problem. Winning a Wednesday permit helps little if you are sleeping two hours away with a dawn drive through traffic. Campground, housekeeper lodge or nearby gateway towns need to be booked with the same seriousness as Recreation.gov.

How do Half Dome preseason and daily lotteries work?

Day-hike permits come from Recreation.gov: a March preseason lottery with mid-April results, plus a daily lottery two days before your hike. Expect a non-refundable application fee and a per-person recreation fee if awarded. Overnight approaches use the wilderness permit system instead.

Preseason applications typically run 1–31 March for the upcoming cable season. One application can cover a small group and multiple ranked date choices. Daily lottery applications usually open from midnight to 4:00 p.m. Pacific two days prior, with results that evening. Copy times from the live Recreation.gov permit page — they override blog summaries.

Roughly 300 people per day is the commonly cited cable capacity band, split between day hikers and backpackers. Competition is fierce on summer weekends. Weekday flexibility is the main lever that actually moves odds.

If you plan to camp in Little Yosemite Valley or elsewhere on the approach, do not apply in the day-hike lottery — follow wilderness permit rules and Half Dome tags as described on the official wilderness pages. Mixing systems is how people arrive at the subdome with the wrong paper.

Keep a calendar reminder for 1 March if you care about preseason odds, and a second reminder pattern for daily-lottery mornings while you are in the park. Phone battery anxiety is real after a long approach — carry a power bank if your permit lives as a screenshot. Rangers have seen every “my phone died” excuse; bring a paper backup print when you can.

Alternate leaders and name-change rules are strict on Recreation.gov products. Decide the permit holder before you apply and do not casually swap who shows up at the checkpoint.

What is a realistic Half Dome day itinerary?

Leave the valley in the dark, climb via Mist Trail or JMT past Vernal and Nevada Falls to Little Yosemite Valley, ascend to the subdome checkpoint, climb the cables if conditions are dry and safe, then reverse the entire descent. Build a hard turnaround time before you start.

Sample summer day: 04:30–05:00 trailhead departure, Mist Trail in cool hours, steady pace to the subdome by late morning, cables only if rock is dry and skies are free of thunderstorm build-up, back to the valley late afternoon or evening. Carry a headtorch for the return even if you planned daylight.

Sample lottery-loss day: Clouds Rest (long, huge views), Panorama Trail, or a Valley classics loop (Upper Yosemite Fall for fit hikers). Do not invent a cables attempt without a permit — rangers check.

Thunderstorm patterns in the Sierra matter. Granite and cables in rain are a common epicentre of incidents. If clouds tower over Tenaya country after midday, turn around even if you are close. Summit fever is how people become statistics.

Pacing splits help groups stay honest: note the time at the top of Nevada Fall and at Little Yosemite Valley. If you are already behind a pre-agreed schedule, the cables are not owed to you. Descending past Vernal Fall with dead quads in the dark is a longer suffering than missing the summit plaque.

Treating blisters at the first hotspot beats heroically ignoring them until the subdome. Tape, lubricant and spare socks weigh little compared with a hobbling descent.

• Eat breakfast before the trailhead — bakery lines burn darkness
• Pack more water capacity than you think; treat or carry enough
• Gloves with grip help on cables; practice on steep stairs beforehand
• Reserve valley lodging or camps months ahead for peak weeks

Which month is best for Half Dome cables?

June and September often balance snowmelt, thunderstorm patterns and crowd pressure better than July–August weekends. Late May depends entirely on whether cables are up. October can be excellent until cables come down or storms end the season early.

High snowpack years delay cable installation. If your trip is late May, hold refundable lodging until NPS confirms cables. Midsummer offers long daylight but heat on south-facing granite and busier lotteries. Autumn brings clearer air and colder mornings.

Smoke from wildfires can cancel views and strain lungs even when permits are valid. Check air-quality forecasts alongside the permit email.

Holiday clusters — Memorial Day weekend near cable install, 4 July, Labour Day — intensify both lottery competition and trail congestion. If your calendar is fixed to those weekends, invest even more in training and Plan B peaks such as Clouds Rest, which often delivers comparable drama without the cable checkpoint.

If you lose preseason, do not abandon the valley reservation immediately. Daily lottery maths can still work across a four-night stay if you apply every eligible morning. Pair each attempt with a locked Plan B hike so the day is never emotionally empty at 8 p.m. when results post.

What gear and training plan work for Half Dome?

Train with long stair sessions and 15–20 km hikes on consecutive weekends. Carry a light day pack with layers, 3+ litres water capacity in heat, calorie-dense food, first aid, headtorch and cable gloves. Broken-in shoes with reliable tread are non-negotiable.

If you cannot complete a 1,000 m gain day with a smile three weeks out, you are not ready for Half Dome regardless of lottery luck. Compare training load to preparing for a hard day on the GR20 rather than a city sightseeing walk.

Poles help on the approach but are typically stowed for the cables. A soft flask vest keeps hands freer. Cotton shirts and new boots are the classic preventable misery pair.

Training block suggestion across six weeks: two weekday stair sessions with a pack, one long weekend hike that builds to 1,000–1,200 m gain, and one recovery walk. In the final ten days, sleep and hydration matter more than heroic new mileage. Arrive in the valley with fresh legs, not a taper that was actually a party.

Navigation is straightforward on the main signed corridors in summer, but smoke, fog and fatigue still justify an offline map. Do not outsource the entire day to following a line of strangers — groups take wrong spurs toward climbing routes when visibility drops.

What are the main safety issues on Half Dome?

Fatigue falls, wet cables, lightning and heat or exhaustion dominate risk — not mountaineering grades. Turn around for rain on the cables, storms or cramping that will not clear. The subdome stairs are already steep; the cables amplify consequences.

Altitude (~2,700 m on the summit) can add headache for visitors from sea level, but Yosemite Valley approaches are not Himalayan expeditions. Still, sleep, hydrate and avoid stacking Half Dome the morning after a red-eye into Fresno or Oakland.

Crowding on the cables creates stop-start traffic. Keep space, communicate passes clearly and do not yank the cable beside someone unsteady. If your group includes a reluctant hiker, set a Scout-Lookout-style agreement in advance: Little Yosemite Valley or the subdome base can be the win.

Lightning protocol is simple and non-negotiable: if you hear thunder or see building cells while still below the cables, you do not “hurry to tag the top.” Granite domes are terrible places to debate meteorology. Descend toward tree line and valley cover with the same focus you brought to the ascent.

Knee-care on the descent decides whether you enjoy the rest of your Yosemite week. Shorten your stride, use poles on the JMT, and stop for food before you bonk above Vernal Fall. Many epics begin after a successful summit when blood sugar drops and darkness arrives together.

What are realistic Half Dome lottery odds?

Recent public commentary often cites roughly one-in-five style success rates for preseason applications overall, with much worse odds for a single peak Saturday. List multiple dates, prefer midweek and enter the daily lottery as backup.

Group size and date greediness both hurt. A two-person weekday September bid is a different product from six people on 4 July. NPS publishes statistics some years — use those over social-media anecdotes.

Mist Trail or John Muir Trail for the Half Dome approach?

Mist Trail is shorter and steeper past Vernal Fall, with wet stone and crowds in peak hours. The John Muir Trail is longer, gentler on knees for some, and a common descent choice. Many hikers ascend Mist and descend JMT — or the reverse based on spray and traffic.

In spring high water, Mist Trail spray can soak you; pack a shell. Either way, the statistical crux remains the cables and your energy for the return, not the waterfall selfie stop.

Some hikers ascend the John Muir Trail to save knees for later and descend Mist when spray is lower in late season. Others do the opposite for morning photos at Vernal. Neither choice replaces fitness. If stairs destroy you on the way up, the cables will not magically feel easier.

Rest stops with food beats doom-scrolling at Nevada Fall. Keep the phone for maps and permit proof; save the summit post for the valley pizza.

Can you hike Half Dome when the cables are down?

Not as a tourist day hike. Without cables, the route is considered a technical climb requiring appropriate experience and equipment. Do not treat bare granite as a steeper walk or a clever off-season shortcut for visitors.

Plan valley classics, Glacier Point Road hikes when open, or snow sports in season instead. Ambition without skills is how rescue reports get written.

Winter mountaineering on Half Dome is a specialist pursuit with avalanche, ice and commitment issues far beyond this permit guide. If your trip falls outside cable season, rewrite the holiday around waterfalls, valley rims and museums rather than inventing a “secret summer route” in January. Keep the cables for a summer return when permits and daylight align.

Should you hike Half Dome alone?

Solo is common for experienced hikers, but a partner helps with pacing, cable confidence and emergency support. If solo, file a plan with someone off-trail and carry emergency communication appropriate to your risk tolerance and route length.

Novices should not use Half Dome as their first solo mountain day. Prove fitness on Clouds Rest or longer valley-rim days first.

If you solo, set a turnaround watch alarm and obey it. Ego is louder when nobody is there to suggest lunch. Carry an emergency communication device if you routinely hike beyond cell coverage — valley bars fade as you climb.

Is Half Dome suitable for children?

Only exceptionally strong, experienced young hikers with calm exposure tolerance — and even then it is a parental judgement call. Most families should choose waterfall trails, Sentinel Dome or Glacier Point views instead of forcing the cables.

Distance and cables are a harsher test than Angels Landing’s length. There is no prize for traumatising a child on granite.

Teenagers who already bag long Sierra days and stay calm on exposure can succeed with careful parenting — but “my friend did it at 12” is not a training plan. Make the first Yosemite trip about waterfalls and Glacier Point if there is any doubt. You can always return for the cables another year.

Half Dome permits — common questions

Enter March preseason and daily lotteries, verify cable dates, train for a very long day, and keep Plan B hikes ready. Official Recreation.gov and NPS pages override every blog table, including this one when rules change.

Use this final list the week before your application windows. If anything below conflicts with the live permit page, trust the live page and adjust your Plan B hikes the same evening — not at the subdome checkpoint.

• Are permits checked? — Yes, at the subdome area when cables are up.
• Can I add friends later? — Group composition rules are strict; read the permit terms.
• Do I need bear-aware food storage? — Follow valley and wilderness food rules for your itinerary.
• What if it rains at the cables? — Turn around; wet cables are a common incident factor.
• Is a guide required? — No for the standard cable hike.
• Can I camp on top? — No tourist camping on the summit dome.