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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)
Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
  • bi-directional trail
  • no data
Trail Last Ridden
Trailforks scans ridelogs to determine the last time a trail was ridden.
  • < 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
Contribute Details
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
Trail Popularity ?
Trailforks scans ridelogs 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 rides = more kinetic energy = warmer colors.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
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Radar Time
x Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
  • mountain biking recent
  • mountain biking (>6 month)
  • hiking (1 year)
  • moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
  • Downhill Ski
  • Backcountry Ski
  • Nordic Ski
  • Snowmobile
Winter Trails
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
x Missing Trails
Most Popular
Least Popular
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 riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
Trails Deemphasized
Trails are shown in grey.
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Only show trails with NO bikes.
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      Grass Lake Nature Park is a sleeping beauty of Olympia's park and open space inventory. Acquiring the property was a steady vigil for property owners, citizen groups, Olympia City Council and staff in the late 1980's. As the hard work of all may be forgotten over time, the place we call Grass Lake will remind us endlessly of our ties with nature.

      The park contains the headwaters of Green Cove Creek and one of the most environmentally intact wetland systems in northern Thurston County. Over 100 bird species and 200 plant species have been recorded in the park. Grass Lake Nature Park's primary functions are wildlife protection, wildlife viewing, and environmental education.
      Parking google parking directions
      Activities Click to view
      Region Details
      • 3

      Region Status
      Open

      Stats

      Trails (view details)
      3
      Trails Mountain Bike
      3
      Trails Hike
      4
      Trails Trail Running
      4
      Ridden Counter
      2

      Popular Grass Lake Nature Park Mountain Biking Trails

      Recent Ride Log Activity in Region

      Today
      • 1 rides
      Yesterday
      • 0 rides
      Past Week
      • 2 rides

      Activity Feed

      usernameactiontypetitledate
      markhollowayaddpoiactivity #46917372
      Dec 3, 2023 @ 2:08pm
      Dec 3, 2023
      markhollowayaddregionactivity #46917354
      Dec 3, 2023 @ 2:05pm
      Dec 3, 2023

      Nearby Areas

      namedistance
      Heritage Park2.1 km
      Watershed Park 53.5 km
      Woodward Bay Conservation Area 37.1 km
      Kennedy Summit Lake 5 307.6 km
      Millersylvania State Park 149.8 km

      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike3
      #6,24167
      Hike4
      #6,6653
      Trail Running4
      #7,142
      • By markholloway Trailforks Map Team & contributors
      • Admins: FOCF, EMBA-C2S
      • #61882 - 125 views

      Downloading of trail gps tracks in kml & gpx formats is enabled for Grass Lake Nature Park.
      You must login to download files.