This route covers 26km return.It involves around 1,460m of cumulative elevation gain.
The route reaches roughly 2,690m at its highest point. While the altitude is moderate, weather exposure and wind can make conditions feel more demanding than the elevation suggests.
Technically, the Half Dome standard trail is challenging. The primary difficulty is the sustained physical effort required or technical terrain features.
Overview
Technical Summary
Half Dome is the significant icon of Yosemite National Park and arguably the most famous and coveted day hike in North America. Looming almost 5,000 feet (1,500m) above Yosemite Valley, the massive granite dome challenges hikers with a grueling, massive elevation gain.
The Cables. The 'X-Factor' is the raw physical and psychological exertion of the final cable ascent. The granite is polished smooth by millions of boots. Hanging onto the steel cables, looking back over your shoulder down a demandingly steep slide straight into the valley, is a right of passage that separates standard hikers from those who have 'done the Dome.'
Hazard Assessment
Half Dome is a giant lightning rod. Several people have been killed by lightning while on the summit or the cables.
The granite is slick. If you fall outside the cables, there is nothing to stop you.
The Expert Take
Success on this route requires balancing physical stamina with environmental awareness.Local conditions shift rapidly; always verify forecasts with regional authorities before moving to higher ground.
Stage Breakdowns
The Valley Floor to Nevada Fall
Starting at Happy Isles (usually at 4:30 AM in the dark), hiking up the paved path, and ascending the wet, steep granite stairs of the Mist Trail alongside Vernal and Nevada Falls.
Little Yosemite to Sub Dome
Hiking through the relatively flat, sandy forest of Little Yosemite Valley, before beginning the grueling, exposed zig-zags up the granite shoulder to the base of Sub Dome.
The Cables and Descent
Showing your permit to the ranger. Scrambling up Sub Dome, pulling yourself up the 400ft cables to the summit, and then making the agonizing 8-mile hike back down to the valley.
Route
Geometry
Topographical Data & Reference Points
- Route Typehiking
- Highest Pointpeak elevation on route2690m
- Lowest Pointvalley floor elevation1220m
- GPS Location37.7460°N 119.5332°W
Technical Profile
Vertical Ascent Profile
An unrelenting, massive uphill slog. It begins steeply with thousands of granite stairs on the Mist Trail, flattens briefly in Little Yosemite Valley, becomes an agonizingly steep switchback climb through the forest, a strenuous stair-master on Sub Dome, and finishes with the 45-degree cable pull.
Terrain Characteristics
The Half Dome is primarily non-technical (Class 1), with optional technical variants. It is classified as Technical terrain based on cumulative vert and exposure.
The cumulative energy expenditure for Half Dome represents a significant physical commitment. Success requires adequate preparation and moisture management.
Data referenced from regional park authority sources and topographic surveys.
Technical
Matrix Profile
The HikeMetrics Global Matrix provides an objective, multi-dimensional assessment of technical difficulty, exposure risk, and environmental load.
Risk Summary
Professional evaluation of route mechanics and environmental stress factors. Recommended for participants within specified technical scope.
This profile uses the HikeMetrics v1.0 risk matrix, prioritizing environmental stress and movement complexity over simple elevation metrics.
Technical Specs
Access & Logistics
Regulations
Rangers check permits strictly at the base of Sub Dome. You cannot sneak up.
Seasonality
The cables are only hoisted from roughly Memorial Day (late May) to Columbus Day (October), depending heavily on snowpack. Hiking when cables 'down' is extremely dangerous and requires technical rock climbing gear. Regulations change; verify with the official park or local authority before departure.
Safety Index
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Next Operational Phase
Get Field Ready
Logistics & Permits
Verify all permit requirements and regional park access rules. High-season routes often require advance coordination for logistics.
View Requirements Protocol 02Field Preparation
Ensure equipment matches the technical demands of the specific terrain. Check current trail reports and humidity/wind variables.
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Direct Comparison
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Core Concepts
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Topic grouping based on geography, physical exertion profile, and technical movement typology.
Route Questions
How hard is it to get a permit?
Extraordinarily difficult. The preseason lottery occurs in March and has a success rate of about 20%. There is a daily lottery two days in advance during the season, but it is equally competitive.
Do permit rules stay constant year-round?
Not always. Permit and guide requirements can change by season and region. Verify the latest rules with the official park office or local authority before departure.
What is the safest start-time strategy?
Start early and plan to clear exposed sections before midday. This reduces heat, storm, and visibility risk on most mountain routes.
How much water capacity is usually needed?
For exposed hiking days, carrying 2-3 liters is common. Increase capacity when refill reliability is low or temperatures are high.
Is mobile signal reliable on route?
Coverage is often patchy outside towns and major valleys. Treat phones as secondary tools and carry offline navigation resources.
Dossier Verification & Sync
Data points indexed in this dossier are cross-referenced against authoritative land management records and regional mapping. HikeMetrics maintains independent verification protocols for all primary route geometry.