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May 14

MTBO CANCELLATION: The odds are now deemed quite high that the trails will be too wet to responsibly ride on this Sunday. As a result, the MTBO portion of this event is cancelled. The foot/classic orienteering will take place.

Welcome back to Rosaryville State Park in Prince George’s County, the site of the 2015 Mid-Atlantic Championships! We have a full set of 7 courses from beginner to long advanced. as well as 3 mountain bike orienteering (MTBO) course options.

Rosaryville is relatively flat, but there are areas of good contour detail. It has a wide variety of vegetation, from large open fields to impenetrable forest. There is an elaborate trail network, and the park is widely known as a trail biking destination.

The courses for runners (and walkers) run the usual gamut from White (beginner) to Blue (long advanced). The climb is not significant. The forest mapped as white is open and runnable in many places. The mapped rootstocks have decayed, and some of them are completely invisible now. Those that remain are often dwarfed by new-fallen trees that are not mapped. Rootstocks are not used as control locations on these courses.

On Foot: Registration is from 10:30 to 1:15, and you must be off the course by 3:00 p.m. Please check in with the finish crew even if you did not complete your course. White, Yellow, Orange, and Brown courses will be printed at 1:7500. Green, Red, and Blue will be at 1:10000. Newcomers are welcome, and beginner instruction will be available at all times. An introduction to the course colors and difficulties can be found on our home page, and our volunteers can help you select an appropriate course if you are unsure.


Rosaryville State Park, Pavilion parking area, Rosaryville, MD (Classic)

RegistrationNo advance registration required. Just show up and have fun!
Start TimesFoot-O participants may start between 11am - 1:30 (and must be off the course by 3pm).
ScheduleSunday, May 14
11:00 am - 1:30 pmClassic: Foot orienteers: Start anytime during this time period
3:00 pmClassic: Foot Orienteers: must be out of the woods by 3pm
Event Director:Virginia DeBons
Course Designer:Tom Nolan
Location Details

Classic, Classic
Rosaryville State Park
Pavilion parking area
Rosaryville, MD
Google Map

From I-495 exit 11A, head east on Rt 4 (Penn. Ave) for 3 miles. Turn right on Woodyard Rd/MD-223, then quickly move left to turn left on Marlboro Pike. After 2.8 miles, turn right on Crain Hwy/Rt-301 S, then take the first right on W. Marlton Ave into the Park. Follow O'signs within the park.

Park Entrance Fees: $3/pp in-state, $5/pp out-of-state
Google Maps Link
Apple/iPhone Link

Course DetailsClassic
Course NameLength (km)Climb (m)No. Controls
White 2.3309
Yellow 2.7859
Orange 4.1909
Brown 3.7907
Short Mountain Bike 12.411
Green 6.213511
Medium Mountain Bike 15.813
Long Mountain Bike 18.616
Red 7.414512
Blue 8.717013
Entry FeesIndividual Entries

Note: juniors = under 21

Club Member, adult Club Member, junior Non-Member, adult Non-Member, junior
Epunch Owner $5 $5 $10 $5
Epunch Borrower $10 $5 $15 $10

Team or Group Entries

Participants are welcome to compete together as a single team entry. Teams containing one or more nonmembers are charged the nonmember individual rate. Teams containing one or more adults are charged the adult individual rate. For teams to receive member or junior rates, all members of the team must be members or juniors, respectively. Each extra team map beyond the first is an additional $2. Individuals or teams desiring to compete on a second course can do so for a reduced fee of $2/map.

Important Notes
  • At the event, we can only accept payment in cash or check; online, you may use a credit card or PayPal account.
  • If you have access to a smartphone, you may become a member at the event by joining online via this webpage (which also explains the member benefits). Membership is completely optional. If you wish to join or renew, we strongly recommend joining (or renewing) online before the event rather than at it to save time and because it's easier.
  • Most of our events use an 'epunch' timing chip for electronic timing. Individuals or groups without their own epunch pay a higher entry fee (see above), which includes the loan of an epunch for that event. Loaned epunches that are lost incur a $40 replacement fee. Epunches (also known as SI-cards or finger sticks) are usually available for sale at each event as described here.
  • Former QOC members who have let their membership lapse pay non-member fees.
  • Compasses are available at no charge, but if lost incur a $15 replacement fee.
  • Please provide collateral (driver's license or car keys) when borrowing a compass or epunch.
  • For additional safety, whistles are available for sale at $1/each.
  • Free beginner instruction is always available - just ask at the registration table.