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Routes
United States
California
Santa Clara County
San Jose

Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

Routes
United States
California
Santa Clara County
San Jose

Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

Hard

3.2

(1)

20

riders

Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

03:15

38.0km

1,080m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: March 24, 2026

Tips

Includes a very steep uphill segment

You may need to push your bike.

After 13.9 km for 251 m

Waypoints

A

Start point

Bus stop

Get Directions

1

4.15 km

Mine Hill Trailhead

Highlight • Trail

At this trailhead Mine Hill Trail starts with an initial climb up from the parking lot into Almaden Quicksilver County Park. It is the main, longest trail, winding to the …

Tip by

2

7.12 km

Castillero Trail

Highlight • Trail

Quicksilver is a term used to refer to mercury. These lands, now transformed into an outdoor activity park, were once places where mercury mines were found.

Tip by

3

10.5 km

Mount Umunhum Road

Highlight • Trail

Hiker/biker trailhead parking at the bottom of the well-paved road reopened in September 2017, climbing sometimes steeply in switchbacks into the Sierra Azul preserve from Hicks Road to the former radar tower on the summit of Mt Umunhum

Tip by

4

10.6 km

Lower Mount Umunhum Road

Highlight (Segment) • Climb

If you prefer loops, you can use the paved road for a quick efficient climb up to Mt Umunhum summit and use the excellent packed dirt and gravel mountain bike trail to come back down.

Tip by

5

19.6 km

Mount Umunhum

Highlight • Summit

At 3,486 feet, this peak stands as one of the highest in the region. It features a distinctive block-shaped radar tower that played a crucial role in the military's missile …

Tip by

6

19.7 km

Mount Umunhum Summit

Highlight • Summit

Long closed as a military radar station, the peak has now become one of the most popular biking destinations thanks to the excellent, albeit steep, paved road to the top. …

Tip by

7

19.7 km

Mount Umunhum

Highlight • Summit

Opened in 2018, on the top of Sierra Azul Open Space preserve the Vista points and the former radar tower on the summit of Mt Umunhum provide stunning 360° views

Tip by

8

19.8 km

Mount Umunhum Road (climb)

Highlight (Segment) • Climb

Well paved road reopened in 2017, climbing sometimes steeply in switchbacks into the Sierra Azul preserve from Hicks Road to the former radar tower on the summit of Mt Umunhum. …

Tip by

B

38.0 km

End point

Bus stop

Loading

Way Types & Surfaces

Way Types

23.4 km

12.5 km

1.28 km

746 m

< 100 m

Surfaces

21.5 km

12.3 km

4.09 km

125 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,040 m)

Lowest point (110 m)

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Weather

Powered by Foreca

Today

Tuesday 26 May

21°C

11°C

21 %

Additional weather tips

Max wind speed: 21.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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