more stats
4,977 ft
Distance
79 ft
Climb
-136 ft
Descent
00:05:09
Avg time
-57 ft
Altitude change
256 ft
Altitude min
336 ft
Altitude max
336 ft
Altitude start
279 ft
Altitude end
-1.2%
Grade
-16.3%
Grade max
9.7%
Grade min
1,496 ft
Distance climb
2,156 ft
Distance down
1,299 ft
Distance flat
00:05:09
Avg time

Grays Mill Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Patapsco Valley State Park
    Ellicott City, Maryland
  • Difficulty Rating
    Blue Rate
  • Local Popularity
    70 in Mountain Biking [+]
    • 65 in Trail Running
    • 95 in Hiking
  • Global Ranking
    #25800 in Mountain Biking [+]
    • #136939 in Trail Running
    • #89796 in Hiking
  • State Ranking
    #111 in Mountain Biking · Maryland [+]
    • #832 in Trail Running
    • #565 in Hiking
  • Hiking SAC Scale
    T1 Hiking
  • Trail Type
    Singletrack
  • Direction
    Both Directions
  • Climb Difficulty
    Blue
  • Physical Rating
    Moderate
  • Trail Visibility
    Always easy to follow
  • Dogs Allowed
    Yes
  • Year Opened
    2023

2023 reroute. Fast and fun, please respect the closed old trail markings

Tags

Local Trail Association

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 6 rides
  • 24 miles average
6 Months
  • 59 rides
  • 13 miles avg distance
All
  • 183 rides
  • Last: Oct 27, 2026
c1c2c3c4
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Status:
on Aug 29, 2026
Ideal
Avg: 3.74 (2 votes)
Your vote: 0

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      Directions to grays-mill trailhead (39.255850, -76.757960)
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      3.0 ★★★★★
      2 Ratings
      5 ★
      4 ★ 50%
      3 ★
      2 ★ 50%
      1 ★

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      Nearby Trails

      Patapsco Valley State Park

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      Frequently Asked Questions

      ▼ Where is Grays Mill located?
      Grays Mill is located in Patapsco Valley State Park, Ellicott City, Maryland, United States. It is part of the Patapsco Valley State Park trail network. The trailhead is located at coordinates 39.25585, -76.75796.
      ▼ How hard is Grays Mill?
      Grays Mill is rated as Blue difficulty. The physical rating is Moderate. The average grade is 1.2%. The climb difficulty is rated Blue.
      ▼ What is the elevation gain for Grays Mill?
      Grays Mill has 79 ft of elevation gain. The trail has 136 ft of elevation descent. The elevation ranges from 256 ft to 336 ft.
      ▼ Is Grays Mill a point to point trail?
      Grays Mill is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Grays Mill?
      Grays Mill is 4,977 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Grays Mill?
      Yes, dogs are allowed on Grays Mill. Please keep dogs on a leash where required and clean up after them.
      ▼ How do I access Grays Mill? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Grays Mill are: View all parking locations in the area.
      ▼ How long does it take to ride Grays Mill?
      Based on recorded activities, it takes an average of 5 minutes to ride Grays Mill. The trail is 4,977 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Grays Mill?
      Grays Mill is a very popular trail. There have been 1,200 recorded activities on this trail. The trail has received 1,245 check-ins. View recent activity on this trail.

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