Trail Run Project Logo

Stone Mill 50 Mile

Intermediate
 4.0 (2) RECOMMENDED ROUTE

50 mile trail race in Montgomery County MD


Your Rating:      Clear Rating
Your Difficulty:
Your Favorites: Add to Favorites · Your List
Zoom in to see details
Map Key

50.0

Miles

80.5

KM

97%

Runnable

436' 133 m

High

178' 54 m

Low

3,396' 1,035 m

Up

3,392' 1,034 m

Down

3%

Avg Grade (1°)

19%

Max Grade (11°)

Dogs No Dogs

Features Fall Colors · River/Creek · Views

Overview

The Stone Mill 50 Mile is a 50 mile trail run on the Seneca Greenway and Muddy Branch trails in Montgomery County Md. Traveling over rolling terrain will be a treat for those "hilly-goats" among us, and this is a challenging route.

Need to Know

The race provides drop bags at mile 25ish (Pennyfield lock) and mile 43ish (Riffleford Rd). Aid stations are well stocked, even the ones that claim to only be water stops because the volunteers are so awesome!. Aid is located at (approximately) miles: 8, 12.8, 16, 18.2, 25.1, 28.6, 35, 38, 42.8, and 48. SAG is available at any aid station. Spectators are also welcome at any Aid Station with enough parking to safely accommodate (please visit website for details).

Runner Notes

Mile 1 and 49 are on the paved path along Watkins Mill Rd between the Greenway trail and the school (start/finish line). Mile 11-13 (approximate) is on the paved path along route 28 (between the Long Draught Trail and Muddy Branch Trail). Approximately 3 miles of the course is on the C&O canal towpath (flat, crushed gravel surface)... between Pennyfield Lock AS (~mile 25) and Stone Mill AS (~ mile 28.6). Almost all of the rest is true trail/dirt surface.

Description

The course traverses forested, rolling terrain of Montgomery County as you run towards the Potomac river on the Muddy Branch trail and then return via the Seneca Greenway trail . The course is primarily on singletrack dirt and there are small stream crossings. Most sections of the trails drain well, but lower areas can be muddy in wet weather. The course is labeled extremely well by tree blazes and/or flags on race day, which makes it difficult to get lost.

History & Background

The course will have you visit the namesake Stone Mill as you near the aid station at mile 28.6

Shared By:

Pam Smith

Trail Ratings

  4.0 from 2 votes

#3540

Overall
  4.0 from 2 votes
5 Star
0%
4 Star
100%
3 Star
0%
2 Star
0%
1 Star
0%
Recommended Route Rankings

#37

in Maryland

#3,540

Overall
14 Views Last Month
886 Since Feb 22, 2016
Intermediate

0%
0%
100%
0%
0%
0%

Photos

Lots of trees
Sep 25, 2020 near Darnestown, MD
Historic Riley's Lockhouse
May 18, 2018 near Travilah, MD
Seneca Ridge Trail powerline cut.
Mar 23, 2016 near Darnestown, MD
Heading through the trees.
Mar 23, 2016 near Darnestown, MD
The Seneca Ridge Trail is more open here.
Mar 23, 2016 near Darnestown, MD
Mile 15.
Feb 23, 2016 near North P…, MD

0 Comments

Weather


Current Trail Conditions

Update Conditions
Unknown See History
Add Your Check-In

Check-Ins

May 10, 2020
Michele Jacoby