Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

Hard

3.2

(1)

riders

Mount Umunhum – Mount Umunhum loop from Almaden Quicksilver County Park

03:15

37.9km

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: September 24, 2026

Tips

Includes a very steep uphill segment

You may need to push your bike.

After 13.9 km for 251 m

Waypoints

Start point

Bus stop

Get Directions

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 …

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10.4 km

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

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10.5 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.

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13.8 km

Mt Umunhum Trail

Highlight (Segment) • Trail

If you like hairpin switchbacks, this is the grueling climb (or adrenaline-pumping downhill) for you! You can bike almost all the way to the peak. The very last .2-mile of …

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19.5 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 …

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19.6 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. …

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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

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19.7 km

Mount Umunhum Road (climb)

Highlight (Segment) • Climb

One of the highest virtually car-free road climbs in the South Bay, Mount Umunhum became quickly one of the most popular biking destinations since opening to the public in 2017 …

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37.9 km

End point

Bus stop

Way Types & Surfaces

Way Types