Rails to River Endurance XC Mountain Bike Race

May 2, 2021
Home | Rails to River XC Mountain Bike Race

Rails to River XC Mountain Bike Race

It’s been too long since EX2 hosted a mountain bike race…and it’s been too long since Lake Fairfax has seen a mountain bike race!  So we are fixing both of those things in 2021!!  We are stoked to re-announce (last year’s race was cancelled due to COVID) the inaugural Rails to River Endurance XC Mountain Bike Race.

Race Date: Sunday May 2, 2021
Race Format:
1, 2, or 3 laps (~7 mile lap)

Pre-Race Information Email to Riders
See who is racing!
PDF of course map

The race has reached capacity!

Format and Classes

We originally planned to model this event after the 6-hours of Cranky Monkey races of old, but with social distancing requirements we are going to make this event a straight up XC race with classes doing 1, 2, or 3 laps of the approximately 7 mile course.  Note, we may make a few tweaks to the course this spring with new trail that’s being built.

  • 1-lap: beginner (~7 miles)
  • 2-laps: sport (~14 miles)
  • 3-laps: expert (~21 miles)
  • In each distance, we’ll have the following classes: female 19-U, male 19-U, open female, open male, male masters (40+), female masters (40+), male masters (50+), female masters (50+), singlespeed, clydesdale (200lb+)

Race Start Procedures
We are separating each race into socially distanced wave starts of approximately 50 to 75 people by class.  Each wave will be separated by 8 minutes.

Beginner (1 Lap)
Check-in open from 7:30 to 8:45am
9:00am – Wave 1 – Male Open, Male Masters 40+, Male Masters 50+
9:08am – Wave 2 – All other classes

Sport (2 Laps)
Check-in open from 9:30 to 10:45am
11:00am – Wave 1 – Male Open, Male Masters 40+
11:08am – Wave 2 – Male Masters 50+
11:16am – Wave 3 – All other classes

Expert (3 Laps)
Check-in open from 12:30 to 1:45pm
2:00pm – Wave 1 – Male Open, Male Masters 40+, Male Masters 50+
2:08pm – Wave 2 – All other classes

Lake Fairfax Trail Fund

All the trails at Lake Fairfax Park are primarily built and maintained by volunteers organized by the Mid-Atlantic Off-Road Enthusiasts (MORE).  All racers will have the opportunity to donate to the Lake Fairfax Trail Fund during registration.

Summary of COVID Precautions

The safety and health of all racers and volunteers are of upmost importance.  While all risk cannot be eliminated, the race will have the following mitigations in place.  A summary of our precautions are below.  Read our full COVID operations plan.

  • Event will comply with all local, state, and federal restrictions including participation limits.
  • Start times will be staggered by race.
  • Each start group will be 75 people or less (current VA limit is 100).
  • The event will be chip timed and as touchless as possible.
  • Race giveaways (T-shirt) and post-race food and water are grab and go only and pre-packaged (but definitely tasty!).
  • Parking, check-in, start, and finish areas of the event will have ample room for social distancing.
  • Signage will be used to remind people to wear their face coverings and stay socially distanced at all times.
  • Face coverings are required at all times when in the check-in, starting, and finish areas.
  • Aid stations are staffed for safety only – no water will be provided with the exception of one water refill station at the start. Athletes are required to carry their own hydration.
  • Awards ceremony may be virtual.
  • Riders are not allowed to stay after the race except to cool down.
  • Spectators are not allowed.
  • Ample restrooms (portajohns and park bathrooms) are available to minimize queues. All restrooms will be sanitized once every 2 hours by EX2 staff.
  • Hand sanitizer stations available at check-in, start, and finish.
  • All racers will be required to self-validate that they do not have COVID symptoms or have been exposed to anyone suspected to have COVID for the 14 days leading up to event.

Race Course

Race Course Notes

  • The race course is roughly 7 miles in length with the start and finish of the course at the large pavilion.
  • The elevation change is about 500 feet and there are no significant climbs, although there are numerous shorter ones.
  • The race starts heading up the gravel road towards the cricket fields. 
  • There are a few fairly technical rock sections, but they are short and can easily be walked if needed.
  • Lake Fairfax is awesome…come get some!

Registration Fees

$40 – Early (through 2/15)
$45 – Regular (through 4/1)
$50 – Late (through race day)

Registration Fee Includes

Fun and challenging course design, professional race operations, wonderful volunteer support, mechanical support, awesome aid stations, medical support, plentiful post-race food, electric atmosphere, great music, and awards and give-a-ways.

Race Day Schedule

Sunday May 2, 2021
9:00am – beginner classes staggered starts
11:00am – sport classes staggered starts
2:00pm – expert classes staggered starts

Course will be marked Saturday May 1st (by 1pm) for pre-riding.



Lake Fairfax Park
1400 Lake Fairfax Drive
Reston, VA 20190

From Interstate 495 (Capital Beltway):

  • Lake Fairfax Park may be reached by taking Beltway Exit 47A which is Route 7 or Leesburg Pike west for approximately 7-8 miles to a left on Baron Cameron Avenue.
  • Take the second left on Lake Fairfax Drive which will lead you directly into the park.
  • Enter the follow the signs to check-in.

From Interstate 66:

  • Take I-66 to Route 286 (Fairfax County Parkway – formerly Rt 7100) towards RESTON/ HERNDON and travel about 9.4 miles.
  • Merge onto BARON CAMERON AVE / VA-606 E. Travel about 2.8 miles and turn right onto Lake Fairfax Drive which will lead you directly into the park.
  • Enter the park and follow the signs to check-in.

Race Your Bicycle!