Rosaryville Half Marathon and 10K Trail Run

In-Person 9/6 + Virtual 8/22 - 9/13 Directions
Produced by EX2 Adventures
In-Person Race


09/06 7:00AM EDT
In-Person Race

Half Marathon

09/06 8:30AM EDT
Virtual Race

Virtual 10K


This year's Rosaryville Half Marathon and 10K trail running race is planned to be a hybrid event...meaning we will have both an in-person event and a virtual event.  The in-person race is scheduled for Sunday September 6, 2020 and the virtual race occurs any time between August 22, 2020 and September 13, 2020.  The race is approved to happen by PG County and the state.

** Start list and check-in times (corral) **

** Pre-race information email **

The in-person event is currently sold out and we have a waitlist in place.  The in-person race has a cap of 300 runners.  Check-in times are staggered between 7am and 10am.  Find your check-in time.

The virtual event allows you flexibility on when and where to run the race.  You can run any time between August 22, 2020 and September 13, 2020.  You can run the virtual race at a park near your home, on a treadmill, or even at Rosaryville State Park itself (just not on the in-person race morning)!

Our charity partner for this event is the Capital Area Food Bank.  If you are able, please consider making a donation to this amazing organization during registration.

Summary of COVID Precautions for In-Person Event

Our social distancing plan has been approved by the PG County Health Department as well as MD DNR.  A summary of our precautions are below.

  • Start times will be staggered from 7am to 10am. 10K runners will start between 7am and 8:30am and half marathon runners will start between 8:30 and 10am. Note: the 10K runners are going first to avoid congestion on the trails and finish area since the end of the half marathon course is shared with the 10K course.
  • Each runner will have a specific 15 minute start window and 30 minute start window. For example, the first check-in window is 7am to 7:15am and the first start window is 7am to 7:30am. You will have an opportunity to select your start window, but EX2 reserves the right to reassign you if needed.
  • Each check-in group will be 25 people.
  • Groups 10 people (max) will start every 5 minutes. Smaller groups will start if there is not a queue.
  • Check-in is touchless and event will be chip timed.
  • It is expected that each runner arrives and proceeds to check-in ready to run. Portajohns will be available in the start queue while the runner is getting ready to start. We do not want people checking in and going back to your car.
  • Race giveaways (T-shirt and medal) and post-race food and water are grab and go only and pre-packaged. We will have breakfast burritos, but the selection of food will be MUCH smaller than normal.
  • 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 check-in, starting, and finish areas.
  • Runners must carry a face covering during event (when running) and use when passing if ample distance is not available on the trail. If a racer doesn't have a face covering, then one will be provided to them during check-in.
  • Aid stations are staffed for safety only - no water will be provided with the exception of one water refill station at about the halfway point on the half marathon course. Athletes are required to carry their own hydration.
  • There is no post-race awards ceremony.
  • Runners are not allowed to stay after the race except to cool down.
  • Spectators are not allowed. Strictly enforced.
  • 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.

All runners (both in-person and virtual) receive the sweet swag items listed below!

Swag #1 - AWESOME 3" coaster finisher medal!!

Swag #2 - High quality tri-blend T-shirt

Available in men's and women's sizing


Swag #3 - custom fox logo buff

Who doesn't need a (another) buff!!  The perfect multi-functional headwear!

Course Descriptions and Routes

Conveniently located right off the Capital Beltway, Rosaryville State Park in Upper Marlboro, MD offers a beautiful setting and an amazing trail system.  Not overly technical in nature, the race courses are mostly singletrack and wind through beautiful forest and open fields.  While there are no extended climbs, there are many short rolling ups and downs.  The race courses at Rosaryville are suitable for seasoned trail runners and beginners alike.

Note: if you are participating virtually, then you are not required to run your race at Rosaryville State Park.  See the FAQs page for more information.

Aid Station Note:  2020 course will only have the following aid stations:  HM @ mile ~5.7 and ~9.8; 10K @ mile ~4.

Half Marathon Course

The half marathon course includes the entire 9 mile perimeter trail, the 2 mile interior trail, and some short sections of wide open horse trails.  The elevation change is roughly +/- 1,000 feet.

10K Course

The 10K course includes 5 miles of the perimeter trail and just over one mile of wide open horse trails.  The elevation change is roughly +/- 500 feet.


Invite your friends and family to participate in the race and create a team.  Creating a team is super easy either during registration or after you have already registered.  Please note that all team members are required to register and run the full distance of their race (HM or 10K).  See our FAQs for more info on teams.

Awards Ceremony

We will have a virtual awards ceremony on Sunday September 13th for both the in-person and virtual race.  Additional information will be emailed to all registered racers.

Referral Rewards

Refer your friends and family using your referral link and earn the following rewards:

  • Refer 5 people and receive a $25 refund!
  • Refer 10 people and receive a $25 refund and our new purple Run More Trails T-shirt!

Race Contact Info

If you have any questions about this race, click the button below.


The in-person race is at Rosaryville State Park, but the virtual race can be run anywhere

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