Race Information

stonemill 2015Stone Mill 50 will be held on Saturday,Nov 14 2015 at 6am. Registration to open August 1st here

Registration is 50% full

Stone Mill has been selected as the RRCA Maryland State 50 Mile Championship for 2015


2015 Course:will be mostly the same as in 2014. There are a couple of small possible improvements depending on a WSSC project


2014 Results here

To Volunteer Click Here

The Stone Mill 50 Mile is a 50 mile trail run on the Seneca Greenway and Muddy Branch trails in Montgomery County Md. The course traverses forested,rolling terrain. The course is primarily on single track dirt. There are small stream crossings. Most of the course drains well,but parts can be muddy in wet weather.

Host Hotel:


Parking near start/finish area

Parking at Stedwick ES is limited. There is street parking on Watkins Mill Rd,Apple Ridge Rd,and a few other lots. Please consider carpooling. There is a large park and ride at Exit 11 on I-270

When 6AM Start

The Stone Mill 50 Mile run will start at 6:00 AM on Saturday November 14,2015. The cut off time is officially 13 hours or 7:00 PM,and will be strictly enforced due to permit requirements and so we can let our amazing volunteers go home. Intermediate cutoffs are

6PM to Rt 355 Aid Station, 4 miles to go

4:45PM to the Riffleford Rd Aid Station, 9 miles to go

2:45PM to the Rt 28 Aid Station,17 miles to go

1:30PM to the Stone Mill,23 miles to go

Where Start/Finish Stedwick Elementary School

This year we will have the start/finish at Stedwick Elementary School 10631 Stedwick Road, Montgomery Village,MD 20886

Note that this a different location than in previous years. The course will follow Watkins Mill Road for 1/2 mile to and from the trailhead. This will replace the lap around the high school at the beginning and keep the distance about the same.

Packet Pickup

You can still pickup your packet on race day at the starting area if you can’t make it on Friday,but get there as early as possible (by 5AM).

Refunds and Bib Exchanges: It’s just not practical to process refunds or bib exchanges. If you decide to withdraw from the race please email Barry &Daryl and your entry fee will be donated to the State and County parks instead of buying more stuff for the aid stations.

Pacers: Sorry,no pacers.  Our permits with the various park services have a strict limit on the number of runners so we can’t allow  pacers.