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1.5 miles
Distance
230 ft
Climb
-59 ft
Descent
00:12:25
Avg time
171 ft
Altitude change
438 ft
Altitude min
611 ft
Altitude max
438 ft
Altitude start
609 ft
Altitude end
2.199%
Grade
-7.085%
Grade max
20.064%
Grade min
5,207 ft
Distance climb
1,868 ft
Distance down
699 ft
Distance flat
00:12:25
Avg time
Grass Valley Details
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Activities
- Mountain Bike
- Hike
- Trail Running
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Riding AreaAnthony Chabot Regional Park
Castro Valley, California -
Difficulty Rating
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Voted DifficultyWhite (1 vote)
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Local Popularity70 in Mountain Biking [+]
- 95 in Trail Running
- 80 in Hiking
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Global Ranking
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Trail TypeSingletrack
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DirectionBoth Directions
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Climb DifficultyBlue
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Physical RatingModerate
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Dogs AllowedYes
No community description for Grass Valley trail has been added yet!
AI Generated Description
Grass Valley is a 1 mile popular green difficulty singletrack trail located near Castro Valley California. This mountain bike primary trail can be used both directions and has a moderate overall physical rating with a 230 ft blue climb. On average it takes 12 minutes to complete this trail.
Local Trail Association
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Recent Activity on Trail
Past Week
- 0 rides
6 Months
- 16 rides
- 20 miles avg distance
All
- 164 rides
- Last: Jun 13, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Grass Valley Trail Reports
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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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- > 90%
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- > 6 months
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- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Directions to grass-valley trailhead
(37.759621, -122.116889)
Photos
13 more »
Videos
1 more »
0:31 |
175 |
Nov 17, 2017 , Castro Valley
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Nearby Trails
- Cottonwood 2,546 ft
- Golden Rod (south) 3,018 ft
- Jackson Grade 3,192 ft
- Jalquin 3,881 ft
- Dear Canyon 1 mile
Anthony Chabot Regional Park
- By todd
Trailforks & contributors - #124307 - 2,076 views
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Frequently Asked Questions About Grass Valley
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Where is Grass Valley located?
Grass Valley is located in Anthony Chabot Regional Park, Castro Valley, California, United States. It is part of the Anthony Chabot Regional Park trail network. The trailhead is located at coordinates 37.75962, -122.11689.
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How hard is Grass Valley?
Grass Valley is rated as Green difficulty. The physical rating is Moderate. The average grade is 2.199%. The climb difficulty is rated Blue.
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What is the elevation gain for Grass Valley?
Grass Valley has 230 ft of elevation gain. The trail has 59 ft of elevation descent. The elevation ranges from 438 ft to 611 ft.
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Is Grass Valley a point to point trail?
Grass Valley is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
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