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Spring BYB 5M/10M Trail Running Series Rosaryville Half Marathon/10K Trail Run Reservoir Relay Trail Run
Fountainhead Half Marathon/10K Trail Run Blue Crab Bolt 5K/10K Trail Running Series

XTERRA EX2 Off-Road Triathlon/Duathlon

Hemlock Half Marathon/10K Trail Run Schaeffer Half Marathon/10K Trail Run Fall BYB 5M/10M Trail Running Series
The Spring Backyard Burn:


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The Fine Print
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Note: Our stock of merchandise is currently being replenished. Please check back or email with questions.




The Spring BYB Trail Running Series - Registration

Why Register Early?

  • Guarantee yourself a spot in the race. These races have LIMITED ENTRY and for the past several years have SOLD OUT, often weeks or months before race day.
  • Pay less. SAVE up to 33% by registering early. The earlier you register, the more you save.
  • EX2’s Peace of Mind Registration – Register confidently knowing that, with our very liberal and super racer-friendly policies, you have options should your plans change.
  • Guarantee yourself a t-shirt in your specified size (see below).
  • Registering makes it real and commitment equals motivation.

Who's RacingYou may register and pay online for these races. imATHLETE, our registration service provider, charges a small fee for this convenience. To avoid paying the convenience fee, print out the registration form and send in via the US mail.


Series (ALL 4 RACES on 3/5, 3/26, 4/23 & 5/7)
Race #1 @ Wakefield Park in Annandale, VA on 3/5/17
Race #2 @ Hemlock Overlook in Clifton, VA on 3/26/17
Race #3 @ Lake Fairfax Park in Reston, VA on 4/23/17
Race #4 @ Pohick Bay Park in Lorton, VA on 5/7/17

EX2's Peace of Mind Registration - Very Liberal and Super Racer-Friendly Policies

Individual Races: Spring Series
5 Miles
10 Miles

- New Year (by: 1/8/17)

- Early (1 month out - by 11:59pm on the following dates)
Race #1 by: 2/5/17
Race #2 by: 2/19/17
Race #3 by: 3/23/17

Race #4 by: 4/7/17
- Regular (3 days out - by 11:59pm on the following dates - close of online reg)
Race #1 by: Thurs, 3/2/17
Race #2 by: Thurs, 3/23/17
Race #3 by: Thurs, 4/20/17

Race #4 by: Thurs, 5/4/17
- Race Day (if space is available)


Series (ALL 4 Races): Spring Series
5 Miles
10 Miles

- New Year (by: 1/8/17)


- Early (1 month out from R1 - by 11:59pm on 2/5/17)


- Regular (3 days out from R1 - by 11:59pm on 3/2/17)


- Race Day (At R1 on 3/5/17 - if space is available)


Register by Mail

Via mail by printing the Spring Backyard Burn Registration Form and sending a check made payable to: EX2 Adventures.

Required Forms
Spring Backyard Burn - LIABILITY WAIVER

These liability forms are for review only. If you are registering online, you will sign the waiver online during registration. Those registering with paper form will be emailed and asked to sign the liability waiver online.

Entry Fee Includes

Fun and challenging course design, limited race entry of 300-450 athletes depending on park, professional race operations, wonderful volunteer support, aid stations stocked with water and Gatorade, medical support, computerized timing, accurate results, timely posting of results at the event and on the EX2 website, plentiful post-race food (breakfast burritos and other tasty treats - yum!), electric atmosphere, great music, awards, and colorful t-shirts (one/person for the series. see below).


High-quality, colorful, and artful men's and women's sized cotton t-shirts will be distributed at these races. Why not tech tees? Well, because these cotton tees look and feel so good that you’ll want to wear it around town, not just while working out. All racers that register at least 10 days before the event are guaranteed a t-shirt in their specified size. In an attempt to predict racer participation, we will order some additional t-shirts. However, those registering within 10 days of the event will receive t-shirts while supplies last. Any racer may order either the men’s tee or the women’s tee. Racers will receive one t-shirt for the entire series, regardless how many races in the series are entered. The vast majority of racers do not want more than one t-shirt and this policy enables us to waste less and keep the reg fee as low as possible.

Hi-Res Race Photos

At each of the SBYB races, professional photographers will strive to capture the spirit of adventure and friendly competition. They offer digital downloads and traditional prints. The photos will go online within a few days of the event and a link to the gallery will be available from the ‘results’ webpage.

The Spring Backyard Burn is sponsored by:

Baird Automotive IFP
DrinkMore Water Positively Chiropractic



Thank you for visiting EX2 Adventures.
Since the year 2000, EX2 Adventures has produced quality outdoor adventure experiences for the greater Washington DC metropolitan community. We encourage you to browse our site and join us at our events. Whether as a competitor, volunteer, or sponsor you are sure to have an excellent experience!