Lone Star Armadill-O @ Cooper Lake

Join us at Cooper Lake State Park (South Sulphur Unit) near the charming town of Sulphur Springs, TX, for our 2-day spring meet! Of course, you can come out for just one day as well. This is our newest orienteering map and there’s still a lot to explore! Meet director and course setter notes will be posted soon. 

Lodging is available at Cooper Lake State Park in campgrounds, screened shelters or full cabins. Visit the Texas State Parks Reservations page to learn more and reserve a place to lay your head. All participants will pay a $5 daily entree fee at the gate, unless you’re lodging at the park. Sulphur Springs also has many places to stay. 

Pre-registration is closed.

General info

Event Officials

Meet Director: Ralph Courtney…….Meet Director Notes (PDF) 
Course Setter: Lon Newsom …. Course Setter Notes // Map and Terrain Notes (PDFs)
Assisting School: Hebron High School (CDR. Eduardo Morales)
E-Punch Coordinator: Gene Wernette 


Unless stated otherwise, we’ll offer the full slate of NTOA classes. Classes are determined by age bracket for competitive individuals and +/- age 19 for Recreational (two or more people) teams. 

See a listing of all the NTOA classes. (PDF)


We’ll be offering the following courses:

White: Easiest
Yellow: Experienced beginners
Orange: Intermediate
Brown: Short-length advanced
Green: Medium-length advanced
Red: Long-length advanced

See a detailed description of each course. 

Scoring: Manual punchcards will be used to score the White and Yellow courses. E-punch will be used to score the Orange, Brown, Green, Red and Ultra-Long courses.


Please be sure to check the NTOA Facebook Page or Group for last-minute schedule changes. We hold events rain or shine, but we have unfortunately had to cancel events once in a great while due to high water or other extenuating circumstances.


Time Activity
8:30 – 10:30 a.m. Registration is open
9:00 a.m. Boy Scout merit badge briefing
9:30 a.m. Beginners clinic: Open to all!
10:00 a.m. Orienteers start out on each course in one-minute intervals
2:00 p.m. Courses close — all competitors must be back by this time.


Time Activity
8:30 – 9:30 a.m. Registration is open — Remember, White & Yellow need to get start times!
9:00 a.m. Orienteers start out on each course in one-minute intervals.
12:00 p.m. Courses close — all competitors must by back by this time.
~1:00 p.m. Awards ceremony with two-day results as soon as they can be determined. Courses close 3 hours after the latest starter.


Online pre-registration is highly encouraged! We use the pre-registration numbers to determine how many pre-printed maps to produce for each event. In particular, group leaders, please pre-register or drop the Registrar an email to talk about your  group’s size. We do print a modest number of extra maps, and day-of-race registration is permitted. But there’s no guarantee you’ll have a map. Pre-registration is FREE and opens about 10 days before each event. so please take a moment to do it. Thanks!

Questions about registration? Contact the NTOA Registrar. For questions on other event matters, contact the Meet Director (listed above). 

Event fees

Individuals (1 person navigating on their own):
Only individuals can officially compete (awards for top 3 in each class) at NTOA events. But even if you’re doing it on your own just for recreation, please sign up as a (competitive) individual. Members and youth (aka, Juniors, age 19 and under) pay reduced event fees. There’s a $3 surcharge for adult day-of-race entries. So join NTOA and pre-register! Fee covers 1 map.

Competitor type Cost
Juniors (age 19 and under) $10/day
NTOA (and other O clubs) members $15/day
Non-member $20/day
E-punch rental (Orange, Brown, Green, Red, Ultra-Long courses) $3/day
Day-of-race surcharge $3/day

Recreational Teams (2 or more people navigating together):

We love teams — orienteering is a great family activity! Teams aren’t eligible for awards, just the fun. Base fee covers the first 2 team members and 2 maps. Add people for $5 each. Kids under age 8 are free (after first 2 team members paid).

Team type Cost
All teams (first 2 people) $17/day
Extra person (over age 8) – includes map $5/person/day


Instructions: Select one of the options below to register yourself, the students of your school group, or your fun recreational team. Clicking on one of the buttons will take you to our separate NTOA Registration website. See venue limits and current number of registrants.

Pre-registration is Closed. Please register at the event.

Competitive Individual

Large Group

Recreational Teams

Enter 1 competitive individual at a time.


Enter 1-20 competitive individuals from the same group (e.g., school, club, Scout group, JROTC unit).

Enter 1 recreational team (min. 2 people; max 5 people). 

Register Individual

Register Group Members

Register Teams

See who’s registered

View by surname
View by organization

View by class


Driving Directions to Sulphur Springs, TX
From the west (Dallas): Take I-30 East from Dallas for approx. 80 miles. Follow I-30 E to Shannon Rd E in Sulphur Springs. Take exit 124 from I-30 E.
From the east (Texarkana): Follow I-30 W to Industrial Dr E in Sulphur Springs. Take exit 126 from I-30 W.
From the north (Tulsa): From US-271 S, take TX-286 Loop/NW Loop 286 and TX-19 S into town.
Driving Directions from Sulphur Springs to Cooper Lake State Park:
Travel north for 10 miles on State Highway 19 out of town; then go west on State Highway 71 for four miles and north for one mile on FM 3505 to the park entrance. Time: Approximately 25 minutes.
Note: You can also use Google Maps to navigate directly to Cooper Lake State Park from any direction. Google will take you to the park accurately via some scenic way country back roads. Event signage may be limited from certain directions, so follow signs for CLSP South Sulphur Unit.