more stats
4.5 miles
Distance
433 ft
Climb
-211 ft
Descent
00:21:32
Avg time
220 ft
Altitude change
39 ft
Altitude min
381 ft
Altitude max
39 ft
Altitude start
259 ft
Altitude end
0.9%
Grade
-10.5%
Grade max
21.8%
Grade min
2 miles
Distance climb
1 mile
Distance down
3,491 ft
Distance flat
00:21:32
Avg time

520 Trail Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Gravel Bike
    • Adaptive Bike
    • Winter Fat Bike
    • Hike
    • Trail Running
  • Riding Area
    Marymoor Park
    Redmond, Washington
  • Difficulty Rating
    Access Trail or Doubletrack Rate
  • Local Popularity
    100 in Mountain Biking [+]
    • 95 in E-Biking
    • 55 in Trail Running
    • 75 in Hiking
    • 5 in Winter Fat Biking
    • 5 in Adaptive Biking
    • 85 in Gravel Biking
  • Trail Type
    Paved Path
  • Bike Type
    RD, Fat, Adaptive MTB, Gravel
  • Direction
    Both Directions
  • Climb Difficulty
    Blue
  • Physical Rating
    Moderate
  • Trail Visibility
    Always easy to follow
  • Family Friendly
    Yes
  • Dogs Allowed
    Yes
  • eBike Allowed
    Yes up to Class 2

Connecting Northup Way to Sammamish River Trail. Steep section between 51st and Sammamish Parkway makes for a good hill bomb ending or a powerful warmup climb.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 7 rides
  • 23 miles average
6 Months
  • 161 rides
  • 33 miles avg distance
All
  • 507 rides
  • Last: Sep 18, 2026
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520 Trail Trail Reports

statusdatedescription
Jun 19, 2025 @ 9:02am
Jun 19, 2025
Nov 10, 2024 @ 1:41pm
Nov 10, 2024
Aug 7, 2024 @ 3:14am
Aug 7, 2024
 Trail was great. Problem was the stupid e-bikes cruising at 20+mph without using proper passing courtesy.
Jun 21, 2023 @ 3:49am
Jun 21, 2023
May 21, 2023 @ 1:22am
May 21, 2023
more »
Status:
on Jun 19, 2025
Dry
no votes yet
Your vote: 0

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      Directions to 520-trail trailhead (47.670440, -122.128250)
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      Nearby Trails

      Marymoor Park

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      Frequently Asked Questions

      ▼ Where is 520 Trail located?
      520 Trail is located in Marymoor Park, Redmond, Washington, United States. It is part of the Marymoor Park trail network. The trailhead is located at coordinates 47.67044, -122.12825.
      ▼ What is the elevation gain for 520 Trail?
      520 Trail has 433 ft of elevation gain. The trail has 211 ft of elevation descent. The elevation ranges from 39 ft to 381 ft.
      ▼ Is 520 Trail a point to point trail?
      520 Trail is not a point to point trail. The direction is Both Directions. The trail type is paved path.
      ▼ How long is 520 Trail?
      520 Trail is 4.5 miles long. The trail type is paved path.
      ▼ Are dogs allowed on 520 Trail?
      Yes, dogs are allowed on 520 Trail. Please keep dogs on a leash where required and clean up after them.
      ▼ When is the best time of year to ride 520 Trail?
      Based on activity log data, the most popular months to ride 520 Trail are:
      • June (62 activities)
      • July (56 activities)
      • August (49 activities)
      Check the reports page for current trail conditions.
      ▼ How do I access 520 Trail? Where is the closest parking trailhead?
      The closest parking and trailhead locations to 520 Trail are: View all parking locations in the area.
      ▼ How long does it take to ride 520 Trail?
      The estimated time to ride 520 Trail is approximately 22 minutes. The trail is 4.5 miles long. Actual times will vary based on fitness level, conditions, and pace.
      ▼ How busy is 520 Trail?
      520 Trail is a very popular trail. There have been 5,222 recorded activities on this trail. The trail has received 5,353 check-ins. View recent activity on this trail.

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