The PB&J is a tasty run.

Keith Knipling

PB&J 50k + 25k

A runnable, rolling loop on the trails of Prince William Forest Park. New in 2022, there will be a 25k (one loop) option in addition to the traditional 50k (two loop) option.

  • Sat Oct 29, 2022
Start location
Start time
  • 8:00 am
  • 50 km
Total ascent/descent
  • 2,500 feet
Aid stations
  1. Mawavi Road (7.3 miles)
  2. Turkey Run Education Center (TREC) (13.0 miles)
  3. Start/Finish (16.0 miles)
  4. Mawavi Road (23.3 miles)
  5. Turkey Run Education Center (TREC) (29.0 miles)
  • Entry opens on Thursday September 15, 2022 at 9:00 am. Entry will be limited to 110 runners.
GPX file
Print or download
In charge
Course records
  • Dan Fogg
    4:04 (in 2017)
    Krista Offield
    4:57 (in 2017)

The 7th annual running of the PB&J Fat Ass Trail Race is scheduled to be held in Prince William Forest Park on Saturday, Oct. 29, 2022. New in 2022, there are two race distance options: a 50k (two loops) and a 25k (one loop). Choose your adventure!

The start/finish area is at the Telegraph Road Pavilion, located a short distance past the park’s visitor center, within a half mile of the entrance to the park off of Joplin Road near I-95.


Since 2019, the PB&J runners have used a slightly altered course from the original design, with a new start/finish location within Prince William Forest Park.

For those of you who raced at the pre-2019 iterations of this race, virtually all of the loop portion of the course on the far side of the suspension bridge is the same on the current course as it was in those initial PB&J years. What changed is the approach to that landmark bridge from the start, and then the return from the bridge to the finish of each loop. The singular change on the loop portion of the course is the location of the Mawavi Road aid station, which moved down to the point where the South Valley Trail crosses that gravel road. This has eliminated the out-n-back climb to that aid station on each loop.

Why the “PB&J 50K”? The name of the race is an homage to the late, great training run series hosted on local NoVa trails by Toni Aurilio and Jo Leigh Lockner. The intent of this event is to provide an organized trail race on a relatively easy course in the DC area, and also to provide a great supported training run opportunity on some rolling, non-technical trails.

Aid StationSplitCumulativeCutoffMap
Mawavi Road7.3 mi7.3 mi
Turkey Run Education Center (TREC)5.7 mi13.0 mi
Start/Finish3.0 mi16.0 mi12:30 pm
Mawavi Road7.3 mi23.3 mi
Turkey Run Education Center (TREC)5.7 mi29.0 mi

The details

  • Both races will start at 8 AM.
  • Pre-race briefing will start at around 7:50 AM, so arrive and prepare early.
  • The briefing will be held at the start line (on the pavement adjacent to the large shelter at Telegraph Road).
  • The course will be marked.
  • There will be two aid stations located out on the course.
  • There will be an additional mid-way aid station set up at the start/finish.
  • Rest rooms at the start/finish, and at the second aid station.

Race distances & cut-offs
25k race

  • Consists of one 16-mile loop with a 4 hour time limit.

50k race

  • Consists of two identical 16-mile loops
  • Loop one has a 4 hour time limit.
  • The time limit for the full distance is 9 hours.

Both loops are the same; you should print out and bring with you the marked map, and the simple turn directions. Bear in mind, even though the course will be marked with blue ribbons, you should do your homework, and make yourself aware of the general nature of the course and the trails used for the PB&J 50k.


Race registration
Enter using the VHTRC’s online signup. There is no formal entry fee - this is a “Fat Ass” event. That said, you will be assigned a “tribute” item to bring for common aid. You also have the option of bringing a labeled ziplock bag with personal aid for one or both of the outlying aid stations. Bear in mind, this is not a drop bag (so food only), and it may not be returned to you after the race.

For those wondering how quickly the event may hit its limit of 110, the sign up for the 2018 race opened on August 31st and it closed at that 110 runner cap on September 11th. In 2019 entry opened on Monday September 2nd and closed in a week (the cap of 110 was reached on Monday September 9th). The race did not sell out in 2021.

Park entry
You will need to pay the park entrance fee ($20 per vehicle) at the Visitor’s Center at Pine Grove. If you have a National Park pass, you can display that in lieu of making day visitor payment. The booth will not be manned pre-race, but likely a ranger will be there as you leave after your run.


This is a volunteer-based race. Sign-up will open in September. Check back soon!

Last updated June 28, 2022

Club Event Participant Medical Policy

This is an event with very real risks to your well being. The VHTRC does not provide medical care for runners at this event. Runners are responsible for their own health, safety, and well being at this event. No doctors, nurses, or emergency medical technicians, or anyone with any medical training are available along the course, at any aid station, or at the finish. The club does not supply any medical goods or services, including bandages, splints, antiseptic, or Ibuprofen or any other drugs to maintain the health of runners. Physical, medical, and emergency care is the runners' responsibility. In case of an emergency, we will endeavor to get local emergency personnel to an injured runner as soon as possible. Since most of our events are in remote areas, medical care may be far away in distance or time. Each year, runners finish — or are forced to drop out — with scrapes, deep cuts, hematomas, dislocations, and sprains. Runners have experienced cuts, bruises, bee stings, and asthma attacks. This is an event with very real risks.