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1.5 miles
Distance
230 ft
Climb
-59 ft
Descent
00:11:17
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
00:11:17
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
-
Voted DifficultyWhite (1 vote)
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Local Popularity70 in Mountain Biking [+]
- 90 in Trail Running
- 80 in Hiking
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Global Ranking
-
State Ranking
-
Trail TypeSingletrack
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DirectionBoth Directions
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Climb DifficultyBlue
-
Physical RatingModerate
-
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 11 minutes to complete this trail.
Local Trail Association
-
-
Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Recent Activity on Trail
Past Week
- 3 rides
- 10 miles average
6 Months
- 27 rides
- 19 miles avg distance
All
- 182 rides
- Last: Oct 5, 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
Trail Flow (Ridden Direction)
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The colour categories are based on what percentage of users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
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- < 2 days
- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Trail Popularity ?
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BC Backroad Status
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Directions to grass-valley trailhead
(37.759621, -122.116889)
Photos
13 more »
Videos
1 more »
mtb
0:31 |
177 |
Nov 17, 2017 , Castro Valley
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Nearby Trails
- Cottonwood 1,581 ft
- Golden Rod (south) 1,877 ft
- Jackson Grade 1,985 ft
- Jalquin 2,411 ft
- Dear Canyon 4,432 ft
Anthony Chabot Regional Park
- By todd
Trailforks & contributors - #124307 - 2,268 views
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