Mount Umunhum

Deer in the woods on Mount Umunhum

I hiked Mt UmunhumMount Umunhum is the site of a former Air Force base that was off limits until 2017. The trail to the 3,486' peak travels through beautiful forests in the Sierra Azul Open Space.

One of the tallest peaks in the Santa Cruz Mountains, Mount Umunhum derives it's name from the Native Americans, who called it the "resting place of the humming bird."

Did you know?

The six-story tall concrete "cube" at the top of Mount Umunhum isn't a relic from space travelers, but the base of the former radar tower and nearly all the remains of the original Air Force base. The iconic form is visible from many parts of the South Bay.

Mount Umunhum Basics

  • Summit elevation: 3,486' (1,062.5 m)
  • Vertical gain: 1,141'
  • Hiking mileage: 7.7 miles
  • Location: Sierra Azul Open Space Preserve

Hiking Mount Umunhum

This trail opened up in the fall of 2017, and has been very well engineered and built. It's a pleasure to hike up. Go early to beat the crowds and get the best chance of spotting wildlife along the way.

Trail Guides

Here are detailed trail guides to give you the information you need about each route:

Travel Time

  • Drive time from San Francisco: 1 hour, 20 minutes (65 miles)
  • Drive time from Oakland: 1 hour, 30 minutes (60 miles)
  • Drive time from San Jose: 38 minutes (20 miles)
  • Get turn-by-turn directions on Google Maps

Local Tips

  • No fees for entrance, parking or permits required.
  • The parking lot fills up on the weekends.
  • You can also bag nearby Bald Mountain from the opposite end of the trailhead parking lot. It's a short hike.

Latest Mount Umunhum Trip Reports

These hike logs will give you a feel for what the current conditions are, and the experience from other Six-Pack of Peaks challengers.

Peaceful Easy Feeling..

By Kfanene | November 7, 2018

Not “Manamana”

By Ray Hefner | October 20, 2018

Mt. Umunhum Hike

By Aurea Duque | October 14, 2018

First of Six!

By Daisy | October 14, 2018

Fun & easy hike to Umunhum

By Trish McCallister | October 13, 2018

Mount Umunhum

By Ayreen Stanton | October 1, 2018

Started from bottom.

By Chandra Washington | September 29, 2018

The Easiest?

By Arcadia | September 19, 2018

Solo Hike on Weekday: MOUNT UMUNHUM

By 23saloni | August 30, 2018

Long Day at Umunhum

By Brenda Nowell | August 15, 2018

View all Mount Umunhum trip reports.

2018 NorCal Six-Pack of Peaks logoThe Six-Pack of Peaks Challenge

This hike is part of the Northern California Six-Pack of Peaks Challenge, a series of challenging hikes up six, diverse and scenic Bay Area mountains. Sign-up to take the challenge today! 


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