1. Let's Go Birding

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    Let's Go Birding

    5.0 (2 reviews)

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    14 years ago

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    Sierra Azul Open Space Preserve - Mount Umunhum trail

    Sierra Azul Open Space Preserve

    3.9(38 reviews)
    7.9 km

    Came here for a hike on the Sunday of Memorial Day weekend! Arrived at the Bald Mountain parking…read morelot around 8:30am and there were lots of spots still available. I went on the Mount Umunhum out and back trail. Still pretty green with some wildflowers! There were a decent amount of hikers, and lots of bicyclists. Seems like a very popular spot for mountain bikers! Had to watch out for cyclists most of the hike. Along the trail, there were some informational posts about the mountain's history and at the summit, there was a neat informational site, Native American pow wow example, and good balcony for pictures. Learned that Umunhum has that name because the Natives thought it sounded like a hummingbird! Partially shaded but I still recommend going in the morning. There were lots of switchbacks so the hike felt long - took me around 3 hours and 15 minutes including breaks to complete. When I came back around 11:45am, the parking lot was full and some people were parked on the side of the road. Overall, I would classify the Mount Umunhum trail as moderately difficult. Because of the switchbacks, the incline is very gradual but the hike feels longer. Good views and trails were well-maintained with markers. The constant cyclists slightly detracted from the hiking experience, but I would still recommend!

    Did the Mt Umunhum trail. Mostly shaded. Free parking. Great views. Some historical stuff (WW2…read moreradar builing and Native American religious site) at the top which is a nice reward making it to the top. Can drive all the way to the top if mobility is an issue.

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    Sierra Azul Open Space Preserve - Mount Umunhum trail

    Mount Umunhum trail

    Sierra Azul Open Space Preserve - Mount Umunhum trail

    Mount Umunhum trail

    Sierra Azul Open Space Preserve - Mount Umunhum trail

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    Mount Umunhum trail

    Let's Go Birding - hiking - Updated September 2026

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