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April 20

***** FOOT YES, BIKE NO: MTBO CANCELLED *****. Sorry folks: The storm coming in tonight plus the existing soggy ground conditions compel us to cancel the MTBO part of this event. The foot-orienteering will take place as usual.

Mountain Bike Orienteering (MTBO), weather permitting (update: which it didn't), & Foot Orienteering Competition rain or shine.

Any youth or large groups attending, please contact the Event Director so that we can coordinate pre-registration for your group; the group registration and waiver form is part of the information on our Group Leaders page.

Wondering what Mountain Bike Orienteering is about? Check out these videos (there are 3) from the Australian Orienteering Association:

The other two videos are here ('How To Navigate") and here ('Things You Need To Know').

Have questions? Feel free to use our Contact form anytime!

Update: The meet registration area is in a covered pavilion with a couple of grills and picnic tables. Meet Directors John & Jody Landers will have the charcoal grills going by ~11:30 and a supply of hot dogs, rolls and condiments on hand for finishers. Participants are encouraged to bring a picnic lunch and something to grill for themselves.


Rosaryville State Park, Pavilion parking area, Rosaryville, MD (MTBO & Classic Orienteering)

RegistrationNo advance registration required. Just show up and have fun!
Start TimesYou may start your course at any time during the start window listed below for your event.
ScheduleSaturday, April 20
8:45 am - 9:45 amMTBO & Classic Orienteering: Mountain bike orienteering registration
9:00 am - 10:00 amMTBO & Classic Orienteering: Mountain bike orienteering starts
11:15 am - 1:15 pmMTBO & Classic Orienteering: Classic orienteering registration
11:30 amMTBO & Classic Orienteering: Mountain bike orienteering courses close
11:30 am - 1:30 pmMTBO & Classic Orienteering: Classic orienteering start window
3:00 pmMTBO & Classic Orienteering: Classic orienteering courses close
Meet Director:Jody Landers
Meet Director:John Landers
Course Setter:Mark Mace
Course Setter:Patti Mace
Location Details

MTBO & Classic Orienteering, MTBO & Classic Orienteering, MTBO & Classic Orienteering, MTBO & Classic Orienteering, MTBO & Classic Orienteering, MTBO & Classic Orienteering
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 DetailsMTBO & Classic Orienteering
Course NameLength (km)Climb (m)No. Controls
White 1.8408
Yellow 2.9758
Orange 4.71159
Brown 3.9908
Short Mountain Bike 8.222014
Green 5.713011
Long Mountain Bike 12.931520
Red 7.518513
Blue 9.621016
Course NotesMTBO & Classic Orienteering

MTBO courses: MTBO competitors are required to stay on the trails and fields - no short cuts through wooded areas, however short, are allowed, whether riding your bike, walking with it or carrying it. The trails may of may not be busy on a Saturday morning but the will be open to pedestrians, other cyclists and horses and the usual rules for sharing the trails safely will be in force.

All classic courses: Rosaryville has many trails. So many and in places so densely intertwined it makes for tricky navigation, at least for beginners and even for more advanced competitors who suffer momentary lapses in concentration. Our course setters advise taking the time to read the map and know which trail you are on. You may encounter, in addition to non-orienteering pedestrians, mountain bikers and horses on the trails so please pay attention and share the trails safely.

The map is reported to be in good shape in most respects. However, a significant number of new and therefore unmapped rootstocks have appeared since the map was last updated (something to be dealt with next leaf off season but not before this weekend). You should therefore not place all your trust in rootstocks as significant navigational features - the odds of misidentifying a rootstock on the map with a new one in the terrain are too high for comfort.

Advanced classic courses: use of gaiters or other lower leg protection is recommended - there are some foot-high patches of thorny vegetation here and there in the terrain that you may find difficult to avoid completely. The foliage in general is beginning to get thicker and greener so it may be more of a challenge to spot the controls in some areas than memories of those areas from past events at other times of year suggest. All controls will be hung about 1 meter above ground level.

Entry FeesFoot Orienteering

Individual Entries

Non-Member: $10/adult, $6/junior (under 21 years old)

Member: $6/adult, $4/junior (under 21 years old)

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 $4. Individuals or teams desiring to compete on a second course can do so for a reduced fee of $4/map.

Mountain Bike Orienteering

Non-Member: $15/adult, $10/junior (under 21 years old)

Member: $10/adult, $5/junior (under 21 years old)

Mountain bike orienteering fees will be charged per person, regardless of whether people ride singly or as a group.

Important Notes
  • At the event, we can only accept payment in cash or check; online, you may use a credit card or PayPal account.
  • Most of our events use electronic timing. We will provide you with an electronic timing chip (aka e-stick, finger dibber, or SI-card) for free if you don't own one. Loaned e-sticks that are lost incur a $40 replacement fee.
  • 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 e-punch.
  • For additional safety, whistles are available for sale at $1/each.
  • Free beginner instruction is always available - just ask at the registration table.