Half Dome, Yosemite — The Hike That Asks You to Make a Decision

The cables on Half Dome are fixed from late May to mid-October. They cover the final 400 feet of the dome — a section of granite that averages a 45-degree slope but steepens at the top to what feels like 60 degrees or more. When dry, it's manageable with the cables. When wet, it closes; when the weather turns, it should close.

The decision point is real: at the bottom of the cables, you have done 14 miles and 4,400 feet of climbing. The summit is visible and close. Many people feel compelled to continue by momentum. The question to ask yourself honestly is whether conditions — your physical state, the weather, your comfort with exposure, the state of the cables — actually justify it.

This is one of the few hikes in the country where the psychological test is as interesting as the physical one. The documented fatalities on Half Dome are almost entirely from people who continued past the point where they should have turned back. The mountain doesn't prevent you from making a poor decision — it just presents the choice clearly.

The cables ask a simple question: are you making this decision from a clear place, or from momentum and the sunk cost of the miles behind you? That question has value beyond the hike.

Half Dome works as a wellness experience for a specific reason: the sustained effort of 16 miles and 4,800 feet of climbing produces a full, complete physical exhaustion that most people rarely experience in ordinary life. The kind of tiredness that follows a big physical day is qualitatively different from the accumulated fatigue of busy, sedentary work — it's clean, complete, and followed by unusually deep sleep.

Combined with the altitude (the summit is nearly 9,000 feet), the extended time in one of the most dramatically beautiful landscapes in North America, and the genuine mental engagement the route requires, Half Dome produces a specific reset that's hard to replicate with shorter or easier alternatives.

Sub Dome and the cables

The main route (via the John Muir Trail and Half Dome Trail) passes through Yosemite Valley, up the Nevada Fall corridor, and along the base of Half Dome to the Sub Dome — a steep granite slope before the cables begin. The Sub Dome has its own chain-assisted section and provides a useful preview of what's above.

The cables themselves require gloves (the metal gets warm and rough), steady movement, and constant attention to foot placement. Most people take 45 minutes to an hour for the 400-foot cable section.

The summit

The summit is a broad, mostly flat granite dome with 360-degree views: Yosemite Valley, the High Sierra, Cloud's Rest, the Nevada Fall. The views are exceptional. Give yourself at least 30 minutes at the top if conditions allow.

A permit is required for the cables section. The system is managed by the National Park Service:

• Pre-season lottery: Opens in March for the full season (typically late May through October). Limited permits available via recreation.gov.
• Post-season lottery: A smaller allocation available 2 days in advance through the same system.
• Day hiker quota: There are only 300 permits per day for the cables section. Competition is significant.

The America the Beautiful Pass covers Yosemite entry but not the Half Dome permit fee ($10 per person).

Start before dawn

Most Half Dome hikers start between 5–7am. Starting before 6am gets you above the crowds on the cables, past the most popular sections of the Nevada Fall corridor before midday heat, and back in the valley before late afternoon thunderstorms (common in summer).

What to bring

• At least 4 litres of water (there's a refill station at Little Yosemite Valley, about mile 4)
• Gloves specifically for the cables — not optional
• Trekking poles (useful on descent)
• Headlamp if starting early
• Layers — the summit can be 20–30 degrees cooler than the valley

When not to go

Wet rock makes the cables genuinely dangerous. If the forecast shows any chance of afternoon thunderstorms, have a clear decision rule in advance about when you'll turn back.

Half Dome earns a 9.0 / 10 for delivering one of the most complete physical and psychological experiences available through a day hike in the U.S. The permit system can be frustrating and the crowds on peak summer days are real, but the hike itself — the sustained effort, the decision at the cables, the summit views — is everything its reputation suggests.

It's a long, hard day. That's the point.

Q: How hard is Half Dome for an average hiker?

It's a serious day hike requiring solid fitness — the 16 miles and 4,800 feet of gain will challenge most recreational hikers. Training for the climb specifically (with loaded pack, long days, significant vertical) is advisable.

Q: What if I don't want to do the cables?

The hike to the base of the cables (Sub Dome) and back is itself an excellent, demanding day — approximately 14 miles with 4,400 feet of gain. Many people hike to Sub Dome and turn back; the views are still outstanding.

Q: How do I get a permit?

Apply in the March pre-season lottery at recreation.gov for the best chance. Post-season day-before permits are also available through the same system.