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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.
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Trail Popularity ?
Trailforks scans activity logs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
Think of this as a heatmap, more activities = more kinetic energy = warmer colors.
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Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
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Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.
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SaveHey everyone This is a great area to come ride! There are three main places you can ride, a BMX and dirt jump area, a cross country area, and a nice downhill area with tons of jumps.
Ride this maze of trails just south of the Seatac airport. Lots of fun riding through an area that long ago used to be a neighborhood. Plenty of winding trails to spin around on and the low flying jets keep thing interesting. Trails exist on both the east and west side of the SCORE jail access road. It's fairly flat and beginner-friendly on the east side of the access road; west side trails have are more advanced with more hills, berms and jumps. West side trails are accessible through gates in the chain link fence along the jail access road.
Overall its a nice area, lots to do tons of lines!!!!
Ride this maze of trails just south of the Seatac airport. Lots of fun riding through an area that long ago used to be a neighborhood. Plenty of winding trails to spin around on and the low flying jets keep thing interesting. Trails exist on both the east and west side of the SCORE jail access road. It's fairly flat and beginner-friendly on the east side of the access road; west side trails have are more advanced with more hills, berms and jumps. West side trails are accessible through gates in the chain link fence along the jail access road.
Overall its a nice area, lots to do tons of lines!!!!
source: Evergreen - South Seatac (SST)
google parking directions Activities Click to view
- Mountain Bike
29 trails
- Hike
29 trails
- Trail Running
29 trails
Region Details
- 2
- 23
- 3
- 1
Region Status
Caution as of 2 daysLocal Trail Association
Stats
- Avg Trail Rating
- Trails (view details)
- 29
- Trails Mountain Bike
- 29
- Trails E-Bike
- 1
- Trails Gravel Bike
- 2
- Trails Adaptive Bike
- 1
- Trails Hike
- 29
- Trails Trail Running
- 29
- Total Distance
- 5 miles
- Total Descent
- 1,144 ft
- Total Vertical
- 406 ft
- Highest Trailhead
- 432 ft
- Reports
- 16
- Photos
- 34
- Completed Counter
- 1,981
Popular South Seatac Mountain Biking Trails
• 55 ★ 1.0 • 753 ft • 9 ft • 126 •
Moderately popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes minutes to complete this trail.
• 5 ★ 2.0 • 691 ft • 39 ft • 106 •
Less popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes 1 minutes to complete this trail.
• 5 ★ 3.0 • 853 ft • 18 ft • 75 •
Prior to the jail, Space Mountain was a fun mostly downhill section of trail. The new line drops down to the Des Moines Creek Trail riding down an old rock retention wall.
• 35 ★ 3.0 • 626 ft • 92 ft • 72 •
Less popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes 1 minutes to complete this trail.
• 5 ★ 0.0 • 462 ft • 34 ft • 72 •
Less popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes minutes to complete this trail.
• 40 ★ 0.0 • 503 ft • 41 ft • 70 •
A line built into the side of a raised piece of land soaring a flat sandy trail system.
• 5 ★ 0.0 • 380 ft • 31 ft • 69 •
Less popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes minutes to complete this trail.
• 5 ★ 0.0 • 421 ft • 6 ft • 68 •
Less popular green difficulty singletrack. This mountain bike primary trail can be used downhill primary. On average it takes minutes to complete this trail.
South Seatac Mountain Bike Routes
Photos of South Seatac Mountain Bike
Recent Trail Reports
| status | trail | date | condition | info | user |
|---|---|---|---|---|---|
| Des Moines Creek Trail | Sep 4, 2026 @ 11:35am (America/Los_Angeles) 2 days | Ideal | sveronneau | ||
| Loose Chain | May 9, 2023 @ 2:48pm May 9, 2023 | Unknown | jmlough | ||
| Turns and Berms | May 9, 2023 @ 2:48pm May 9, 2023 | Unknown | jmlough | ||
| The Littlest Hobo | Jun 13, 2021 @ 1:16pm Jun 13, 2021 | Dry | shit2323 | ||
| Space Mountain's Revenge | Feb 24, 2021 @ 3:26pm Feb 24, 2021 | Dry | b0ing | ||
| 200th Access | Feb 23, 2021 @ 8:06pm Feb 23, 2021 | Dry | Rodrdo | ||
| Daytona | Nov 8, 2020 @ 3:16pm Nov 8, 2020 | Dry | sveronneau | ||
| SST Ridgeline | Jun 9, 2019 @ 3:50pm Jun 9, 2019 | Dry | truetonature |
Activity Feed
| username | action | type | title | date |
|---|---|---|---|---|
| sveronneau | add | report | activity #103049583 | Sep 4, 2026 @ 3:08pm 2 days |
| Bagtak | wishlist | trail | activity #96583237 | Jun 8, 2026 @ 8:36pm Jun 8, 2026 |
| ryansharp | comment | trail | activity #94471198 | May 10, 2026 @ 5:41pm May 10, 2026 |
| i23XQ1HF | wishlist | trail | activity #81801587 | Oct 5, 2025 @ 6:48pm Oct 5, 2025 |
| sveronneau | add | report | activity #79643169 | Sep 4, 2025 @ 1:33pm Sep 4, 2025 |
Recent Comments
| username | type | title | comment | date |
|---|---|---|---|---|
| trail | New Des Moines creek trailhead and park is... | May 10, 2026 @ 5:41pm May 10, 2026 | ||
| trail | Ride this downhill, kind of the point of the... | May 17, 2023 @ 3:00pm May 17, 2023 | ||
| trail | This jump is MASSIVE no gap but still | Feb 4, 2023 @ 2:12pm Feb 4, 2023 | ||
| trail | Most exciting trail here! | Aug 22, 2022 @ 12:44pm Aug 22, 2022 | ||
| trail | Dry but uninspiring. | Feb 24, 2021 @ 3:26pm Feb 24, 2021 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Salt Water State Park | 3.2 km | ||||
| North SeaTac Park | 40 | 4 | 2 | 4 km | |
| Seahurst Park | 2 | 4 | 4.8 km | ||
| Tapeworm | 3 | 5 | 1 | 6.3 km | |
| Burton Acres | 3 | 7.1 km |
Local Badges
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Completionist0 awarded
Local Products
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | activity logs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 29 | 5 miles | 1,145 ft | 3 miles | 407 ft | #11,041 | #4,417 | 28 | 16 | 1 | 1,300 | |
| E-Bike | 1 | 2 miles | 230 ft | 1 mile | 226 ft | 10 | 30 | |||||
| Gravel Bike | 2 | 2 miles | 230 ft | 1 mile | 407 ft | #6,698 | #2,826 | 6 | 1 | 5 | ||
| Adaptive Bike | 1 | 256 ft | 62 ft | #6,711 | #2,825 | 1 | ||||||
| Hike | 29 | 5 miles | 1,145 ft | 3 miles | 407 ft | #13,376 | #5,613 | 16 | 122 | |||
| Trail Running | 29 | 5 miles | 1,145 ft | 3 miles | 407 ft | #12,374 | #4,871 | 16 | 139 |
Frequently Asked Questions About South Seatac
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What are the highest rated mountain biking trails in South Seatac?
The highest rated mountain biking trails in South Seatac are:
- Turns and Berms (3.8/5)
- Space Mountain's Revenge (3.7/5)
- SST Ridgeline (3.7/5)
- Cracker Jack (3.7/5)
- Bulldozer (3.6/5)
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Where can I park to ride in South Seatac?
There are 3 parking locations listed in South Seatac. The most popular parking spots are: View all parking and trailhead locations on the map to plan your visit.
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What is the longest trail in South Seatac?
The longest trail in South Seatac is Goal Post at 1,722 ft. View all trails sorted by distance.
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How many trails are in South Seatac?
South Seatac has a total of 29 trails. Browse top mountain biking trails in South Seatac to find detailed information including difficulty ratings, distances, and trail conditions.
Activities
- By jmahler
TRAILFORKS WMBC Amb & contributors - Admins: EMBA-C2S
- #13607 - 7,017 views
- south seatac activity log | embed map of South Seatac mountain bike trails | south seatac mountain biking points of interest
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