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A beautiful 5.6 mile long loop with a great view of Lake Grant.

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2,632' 802 m


1,577' 481 m


1,147' 350 m


1,147' 350 m



Avg Grade (4°)


Max Grade (12°)

Dogs Leashed

Features Lake · Views · Wildlife


A peaceful and easy-to-moderate trail with great views especially in winter and spring. Another good thing about the trail is that there is not much traffic, so it is a great option if you prefer solitude!


The hike starts from the parking area located just south of Grant Lake. From the parking lot, head north on Halls Valley Trail which heads along the eastern shore of Grant Lake. After about 0.3 miles, at the junction with Bernal Trail, take a right to stay on Halls Valley Trail which heads off to the east.

At about 0.5 miles into the hike, you'll reach a junction with Los Huecos Trail which heads right, but to follow the hike as mapped, stay left on Halls Valley Trail. The trail begins to climb an easy to moderate grade as it ascends the north side of the drainage. At 2.7 miles, when Halls Valley Trail trail ends at Canada de Pala Trail, take a right and continue climbing. After about 0.3 miles, take a right onto Los Huecos Trail and you'll soon reach the highest point on this loop.

Descend Los Huecos Trail which follows the ridgeline all the way back to the junction with Halls Valley Trail. Take left onto Halls Valley Trail and once you reach the lake, another left will take you back to the parking lot.

These trail are mostly dirt singletrack and can be rather exposed. Therefore, the best time to visit is during the winter or spring months when the weather is cool. Since there is not much shade, in warmer weather its best to start early as it gets hot in mid-day—take plenty of water.

It's best to hike with a friend or a group. On our last visit there was a layer of fog surrounding the mountains and Grant Lake which presented some of the amazing views.

Flora & Fauna

Plenty of wildlife, we have seen wild boars and coyotes on these trails. Also, the oak trees on the side of the trails further enhance the beauty of this area.


Land Manager: Santa Clara County Parks

Shared By:

Haroon Muhammad

Trail Ratings

  4.6 from 9 votes


  4.6 from 9 votes
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in California


14 Views Last Month
2,944 Since Jan 6, 2018
Intermediate Intermediate



Lake Grant
Jan 7, 2018 near Alum Rock, CA
The hills of Joseph D. Grant County Park stretch on forever, with Grant Lake in the valley below on the left. Far in the distance are the blue Santa Cruz Mountains. Looking southwest from high on Halls Valley Trail.
Apr 14, 2020 near Alum Rock, CA
Grant Lake, nestled in the grass hills, is passed by wildflower adorned Bernal Trail.
May 29, 2020 near Alum Rock, CA
The blue Santa Cruz Mountains are in the distance with Loma Prieta, 3,790 ft., the highest, on the left. Nearer, are the spring green hills of Joseph D. Grant County Park.  Seen looking southwest from high on Los Huecos Trail.
Apr 14, 2020 near Alum Rock, CA
Awesome views of the far away wooded, coastal hills and nearer wooded and grass hills of Joseph D. Grant County Park, from high on Halls Valley Trail.
May 29, 2020 near Alum Rock, CA
Joseph D. Grant County Park
Jan 8, 2018 near Alum Rock, CA


Current Trail Conditions

All Clear 55 days ago
Add Your Check-In


Jun 11, 2023
Marie Isabel Gavas
Feb 27, 2022
JP Reddy
Nov 25, 2021
Kim Sergerie
May 2, 2021
Cédric Vidal
Jan 6, 2021
mich n
clockwise direction to yerba buena trail
Jul 28, 2020
Sonya Bruner
Mar 6, 2019
Sam Johnson
Feb 8, 2019
Karen Huang
2h 30m

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