more stats
4,357 ft
Distance
84 ft
Climb
-85 ft
Descent
00:09:36
Avg time
0 ft
Altitude change
387 ft
Altitude min
440 ft
Altitude max
440 ft
Altitude start
440 ft
Altitude end
-0%
Grade
-17.5%
Grade max
20.6%
Grade min
1,161 ft
Distance climb
1,230 ft
Distance down
1,913 ft
Distance flat
00:09:36
Avg time

Parasite Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Hike
    • Trail Running
  • Riding Area
    Tapeworm
    Renton, Washington
  • Difficulty Rating
    Blue Rate
  • Voted Difficulty
    Blue (3 votes)
  • Local Popularity
    95 in Mountain Biking [+]
    • 45 in E-Biking
    • 5 in Trail Running
    • 65 in Hiking
  • Global Ranking
    #40538 in Mountain Biking [+]
    • #32021 in E-Biking
    • #131737 in Trail Running
    • #124956 in Hiking
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC
  • Direction
    Both Directions
  • Climb Difficulty
    Green
  • Physical Rating
    Easy
  • Dogs Allowed
    Yes
  • eBike Allowed
    Yes up to Class 1
  • TTFs on Trail
    A-Frame, Drop, Skinny, Teeter Totter, Wallride

Tightly wound in a small space, featuring lots of ups and downs and tricky features. This is Silkworm's less flowy brother with some one-of-a-kind wood features scattered throughout.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 1 rides
  • 4 miles average
6 Months
  • 48 rides
  • 6 miles avg distance
All
  • 758 rides
  • Last: Sep 9, 2026
c1c2c3c4
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update trails status or condition

Parasite Trail Reports

statusdatedescription
Jul 20, 2026 @ 12:36pm (America/Los_Angeles)
Jul 20, 2026
 trail lower is running nice some overgrowth on upper part will be back to trim when i can
Jul 1, 2026 @ 12:05pm (America/Vancouver)
Jul 1, 2026
 Someone needs to come in and clear it, so much overgrown brush.
Oct 22, 2025 @ 5:20pm (America/Vancouver)
Oct 22, 2025
Jun 5, 2025 @ 8:52pm
Jun 5, 2025
Really nice trail but a bit overgrown and marking could be better
Jun 4, 2025 @ 6:49pm
Jun 4, 2025
 Someone's dog crapped in the middle of the trail
more »
Status:
on Jul 20, 2026
Variable
Avg: 4 (18 votes)
Your vote: 0

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      Directions to parasite trailhead (47.471080, -122.193140)
      View on Discover Map

      Photos

      5 more »
      mtb
      404 |
      Mar 17, 2018 @ 2:16pm
      Mar 17, 2018
      mtb
      443 |
      Mar 17, 2018 @ 2:16pm
      Mar 17, 2018
      mtb
      337 |
      Oct 25, 2004 @ 6:50pm
      Oct 25, 2004
      mtb
      288 |
      Oct 27, 2004 @ 7:59am
      Oct 27, 2004

      Videos

      2 more »
      Parasite Trail Obstacles
      mtb
      4:05 | 900 | Sep 7, 2019 , Renton
      Little drop on Parasite
      mtb
      0:06 | 154 | Nov 7, 2018 , Renton

      Technical Trail Features (TTF)

      Routes with this trail

      131
      Tapeworm Time Trail Course (2023)
      ★ 3.0 • 7 miles • 681 ft • 36 • Race •
      This is the proposed Timetrail course for 2023.

      Trail Products

      4.0 ★★★★★
      18 Ratings
      5 ★ 39%
      4 ★ 33%
      3 ★ 22%
      2 ★
      1 ★ 6%

      2 Reviews & Comments

      carlsonwa carlsonwa
      At the west side, the trail merges with the access trail before looping back. It’s not a separate parallel trail.

      I was reminded what an amateur I am by all the skinnies and drops I skipped. Great training ride.

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      Nearby Trails

      Tapeworm

      • By ejbozlee & contributors
      • #28490 - 3,908 views

      Frequently Asked Questions

      ▼ Where is Parasite located?
      Parasite is located in Tapeworm, Renton, Washington, United States. It is part of the Tapeworm trail network. The trailhead is located at coordinates 47.47108, -122.19314.
      ▼ How hard is Parasite?
      Parasite is rated as Blue difficulty. The physical rating is Easy. The climb difficulty is rated Green.
      ▼ What is the elevation gain for Parasite?
      Parasite has 84 ft of elevation gain. The trail has 85 ft of elevation descent. The elevation ranges from 387 ft to 440 ft.
      ▼ Is Parasite a point to point trail?
      Parasite is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Parasite?
      Parasite is 4,357 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Parasite?
      Yes, dogs are allowed on Parasite. Please keep dogs on a leash where required and clean up after them.
      ▼ When is the best time of year to ride Parasite?
      Based on activity log data, the most popular months to ride Parasite are:
      • October (27 activities)
      • August (25 activities)
      • September (24 activities)
      Check the reports page for current trail conditions.
      ▼ How do I access Parasite? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Parasite are: View all parking locations in the area.
      ▼ How long does it take to ride Parasite?
      Based on recorded activities, it takes an average of 10 minutes to ride Parasite. The trail is 4,357 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Parasite?
      Parasite is a very popular trail. There have been 3,012 recorded activities on this trail. The trail has received 5,330 check-ins. View recent activity on this trail.

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