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1.5 miles
Distance
515 ft
Climb
-85 ft
Descent
00:16:50
Avg time
431 ft
Altitude change
673 ft
Altitude min
1,189 ft
Altitude max
758 ft
Altitude start
1,188 ft
Altitude end
5.5%
Grade
-23.3%
Grade max
33.7%
Grade min
1 mile
Distance climb
876 ft
Distance down
220 ft
Distance flat
00:16:50
Avg time
Seaborg Trail Details
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Activities
- Mountain Bike
- E-Bike
- Gravel Bike
- Adaptive Bike
- Winter Fat Bike
- Hike
- Trail Running
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Riding AreaBriones Regional Park
Walnut Creek, California -
Difficulty Rating
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Local Popularity90 in Mountain Biking [+]
- 75 in E-Biking
- 80 in Trail Running
- 80 in Hiking
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Global Ranking
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Trail TypeDoubletrack
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Bike TypeAM, XC, Fat, Adaptive MTB, Gravel
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DirectionBoth Directions
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Climb DifficultyBlue
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Physical RatingModerate
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Trail VisibilityAlways easy to follow
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Dogs AllowedYes
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eBike AllowedYes up to Class 1
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Land OwnerEast Bay Regional Park District
Seaborg trail starts mellow and then goes to a strong climb to connect to Briones Crest. If you do it the other way it'll take you down to Bear Creek Staging area. Mud sticks around for a very long time as much of the flat portion is well shaded.
Adaptive Bike Info
aMTB Green Rating: Beginner features and moderate terrain.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 1 rides
- 12 miles average
6 Months
- 14 rides
- 14 miles avg distance
All
- 84 rides
- Last: Jun 20, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Seaborg Trail 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 riders are riding a trail in its intended direction.
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- > 90%
- > 80%
- > 70%
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- < 50%
- bi-directional trail
- no data
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- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
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- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Directions to seaborg-trail trailhead
(37.928140, -122.153300)
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Routes with this trail
★ 1.0 • 27 miles • 4,214 ft • 2 •
This is a great ride in Briones with lots of climbing and several great downhill runs.
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Nearby Trails
- Briones Road 0 ft
- Bear Creek Trail 1,998 ft
- Abrigo Valley Trail 2,533 ft
- Briones Crest Trail 2,674 ft
- Deer Creek Trail 3,514 ft
Briones Regional Park
- By seboz
& contributors - #173532 - 978 views
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Frequently Asked Questions About Seaborg Trail
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Where is Seaborg Trail located?
Seaborg Trail is located in Briones Regional Park, Walnut Creek, California, United States. It is part of the Briones Regional Park trail network. The trailhead is located at coordinates 37.92814, -122.1533.
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How hard is Seaborg Trail?
Seaborg Trail is rated as Green difficulty. The physical rating is Moderate. The average grade is 5.5%. The climb difficulty is rated Blue.
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What is the elevation gain for Seaborg Trail?
Seaborg Trail has 515 ft of elevation gain. The trail has 85 ft of elevation descent. The elevation ranges from 673 ft to 1,189 ft.
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Is Seaborg Trail a point to point trail?
Seaborg Trail is not a point to point trail. The direction is Both Directions. The trail type is doubletrack.
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