Course: The course is a 4 mile loop consisting mostly of forest singletrack but also contains short sections of snowmobile trail, fields, and logging roads. Each lap will have approximately 300' of elevation gain. A minimal aid station will be located midway through the loop.

Format: This will be a last man standing format - for those not familiar with Big Backyard Ultra each participant must finish the course within an hour and be in the starting area when the subsequent lap is completed. The race is over once there is only one person left in the starting area and that person completes their final lap. There will be tiered awards for those who finish 6, 12, & 24+ laps.

Upcoming Races

Oct 2 2021
Variable Hours
Multiple Loop Course
3 Elevation Rating
Hilly, ~2500-7500 feet in 50 miles
3 Surface Rating
Some rocks, root, and/or ruts


Variable Hours View course top times

Date Finishers Top Result Top Result (F)
10/03/20 40 119 52.5
10/05/19 16 86 48.16
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information. If you see an error, please let us know

Dahlgren Heritage Rail Trail 50K

  • Aug 7, 2021
  • King George, VA
50 KM