4.7
(2447)
8,374
hikers
04:22
14.2km
530m
Hiking
The Halls Valley to Washburn Loop in Joseph D. Grant County Park offers a diverse hiking experience, winding through oak-dotted grasslands, thin woods, and open meadows. You'll encounter wide fire road-width paths that transition into sustained climbs, leading to spectacular panoramic views of the Bay Area, including the Santa Cruz…
Last updated: June 9, 2026
Tips
Your route passes through a protected area
Please check local regulations for:
Waypoints
Start point
Get Directions
75 m
Highlight • Lake
Tip by
4.72 km
Highlight • Viewpoint
14.1 km
Highlight • Forest
Tip by
14.2 km
End point
Parking
Way Types & Surfaces
Way Types
12.3 km
1.85 km
< 100 m
Surfaces
6.61 km
5.45 km
1.88 km
231 m
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Elevation
Highest point (880 m)
Lowest point (450 m)
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Weather
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Today
Saturday 11 July
29°C
13°C
0 %
Additional weather tips
Max wind speed: 11.0 km/h
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This route was planned by komoot.
The Halls Valley to Washburn Loop is a moderate hike, covering approximately 14.2 kilometers (8.8 miles) with an elevation gain of about 528 meters (1,732 feet). It typically takes around 4 hours and 22 minutes to complete. While generally moderate, be aware that the Washburn Trail section is known for its steep grades, which can be quite challenging, especially when ascending.
This route is designed as a loop, combining sections of the Halls Valley Trail and the Washburn Trail within Joseph D. Grant County Park. This allows you to experience diverse scenery without retracing your steps.
The Halls Valley to Washburn Loop is located within Joseph D. Grant County Park. You can typically find parking at the park's main entrance or designated trailheads within the park. Always check park signage for specific parking regulations and fees.
The terrain varies, featuring dirt singletrack trails, rolling hills, oak woodlands, and open grasslands. The Halls Valley Trail offers a moderate climb, while the Washburn Trail is known for its steep, challenging grades. Much of the route is exposed, with limited tree cover, so be prepared for sun exposure.
Along the way, you'll encounter beautiful scenery and points of interest. You'll pass by Grant Lake - Joseph D Grant County Park and enjoy a Nice view on Grant Lake. The higher elevations, particularly along the Washburn Trail, offer breathtaking panoramic views of San Jose, the surrounding hills, and on clear days, even glimpses of the Lick Observatory and the Santa Cruz Mountains.
The park is home to various wildlife, including coyotes and wild boars. You'll also see diverse flora such as oak trees and coyote brush. In mid-spring, the park is particularly known for its vibrant wildflower displays, adding a splash of color to the landscape.
The best time to hike this loop is during the cooler months, from late fall to early spring, to avoid the heat, as much of the trail is exposed. Mid-spring is also excellent for wildflower viewing. If hiking during warmer periods, start early in the day and carry plenty of water.
Yes, dogs are generally permitted on trails within Joseph D. Grant County Park. However, they must be kept on a leash at all times. Please remember to pack out all pet waste to help keep the park clean for everyone.
Yes, Joseph D. Grant County Park typically charges an entrance fee per vehicle. You can find current fee information and any permit requirements on the Santa Clara County Parks website: santaclaracounty.gov. It's always a good idea to check their site before your visit for the most up-to-date information.
Yes, the route utilizes several established trails within Joseph D. Grant County Park. It incorporates significant sections of the Washburn Trail and the Halls Valley Trail, and also passes through parts of the Canada de Pala Trail, Los Huecos Trail, and a small segment of the Bay Area Ridge Trail - 03 - South Bay.
Given the significant elevation gain and exposed sections, consider hiking the loop in a counter-clockwise direction if you prefer to tackle the steepest parts of the Washburn Trail on the descent. This can make the overall experience feel less strenuous on your ascent. Also, starting early in the morning is highly recommended, especially on warmer days, to enjoy cooler temperatures and potentially encounter fewer people.
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