Mount Wilson Trail

The historic granddaddy of San Gabriel front-country climbs. Starting from Sierra Madre, 4,700 feet of vertical gain through exposed canyon walls and forested slopes leads to the world-renowned Mount Wilson Observatory summit.

Trail Overview

This is a serious mountain. 4,700 feet of gain in 6.75 miles means you are climbing hard all day. The trail is historic — this route predates most LA infrastructure — and the payoff at the observatory is genuinely satisfying. Resupply point at Manzanita Trail Camp partway up. Do not attempt this in summer heat without a very early start and significant water.

This Hike Is For You If…

Experienced fit hikers comfortable with big elevation days. Anyone training for a Whitney attempt. This is a legitimate benchmark hike for the San Gabriels.

Skip This Hike If…

Skip in summer without a 5:30am start. Skip if you have not regularly done 8+ mile hikes with significant elevation. This trail does not forgive underpreparation.

What to Expect on Trail

Terrain: Well-maintained historical trail. Steep throughout. Some rocky technical sections in upper canyon.

Shade: Partial

Water: Seasonal. Seasonal creek crossings on lower trail. Manzanita Trail Camp has water. Carry 3 liters minimum.

Views: Outstanding

Crowds: Length keeps crowds manageable. Summit area gets day-trippers via Skyline Park road.

Dogs: Yes, dogs are welcome on this trail.

Best Arrival: Before 7am for a summit attempt in shoulder season. This is a long day.

This is a Tier 1 sourced review. Trail information is based on published sources and research. Andrew has not personally hiked this trail yet. Photos and firsthand sensory detail will be added when upgraded to Tier 2.