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blue Almaden Quicksilver Loop

  4.0 ( 30 ) Favorite

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10.8 mile 17.3 kilometer loop
0% Singletrack


Ascent: 1,417' 432 m
Descent: -1,416' -432 m
High: 1,578' 481 m
Low: 496' 151 m


Avg Grade: 5% (3°)
Max Grade: 18% (10°)


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Trail shared by Eric Hong

This loop makes for a good workout with great views.

Eric Hong

E-Bikes Allowed

Features -none-

Family Friendly The wide fire road and pretty scenery of the park is family friendly. Be sure to pick the right route and distance to fit the age of the riders.

Randol Trail is often closed in wet winters. You can check the status of the trails by calling the Santa Clara County Hotline 1-408-355-2200 and then press 7 and then 5.


There is nothing technical about this loop except the three-mile climb from the parking area at Hacienda to Bull Run and a short but steep climb on Randol Trail. It is a good workout with some OK downhill on dirt park roads. Most of the route is scenic.

Need to Know

Be sure to bring enough water for the ride, especially during hot summer days. You need to bring at least 1.5 liters or even 2 liters of water in order to finish the ride without dehydration.


This loop can be ridden in either direction but this is the preferred direction for most riders. It gets the big climb out of the way early and offers a scenic flow from the high point at Bull Run to the beginning of the Randol Trail near the reservoir.

Another possible alternative and slightly longer route is through the Castillero Trail south of the Mine Hill Rd. That's about one more mile through the loop. That will also lead you to the highest peak in the park on the Castillero Trail slightly south of the Bull Run. It is marked with a fire hose stand.

Often deer are near the trail and sometimes bobcats, mountain lions, rattlesnakes, and turkeys. Mountain lions won't bother people, and the rattlesnakes are mellow unless pissed off.

There are some interesting old mines on the April Trail which is a small loop off this route and at the Cristobol Mine adjacent to Mine Hill Trail.

The trails can be a bit crowded on beautiful spring weekends.

History & Background

This loop is through the historic New Almaden mines. This was California's first mine run by Europeans and the mercury smelted here was shipped around the world. It was also used in the California gold fields and after in gold mining in Alaska, Mexico, South America, and Indonesia.


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Apr 7, 2019
Neal Manjeshwar
10.8mi — 12h 15m
Jan 25, 2019
Leo Ang
Jan 2, 2019
Doug Haines
Long but well graded climb, mix of doubletrack and dirt road. Overall good trail/road conditions w a few challenging sections for this beginner/Intr. 10.1mi — 1h 34m
Dec 23, 2018
Jack Howard
Fast downhill 11.3mi — 1h 30m
Sep 18, 2018
Tyler Rosano
Good climb right out of the parking lot definitely a good workout! Awesome flowy descent flowed but some small ups and downs and then more downhill! 10.8mi
Sep 13, 2018
Dave Geissberger
Aug 19, 2018
Sergiy Cherepov
Jun 24, 2018
Dimitri Pecoski
Really fun trail, saw an old mine. Nice views of the bay. Downhills were fun. 13mi

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Trail Ratings

  4.0 from 30 votes


  4.0 from 30 votes
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