2023 Lone Star Armadill-O @ Cooper Lake

Registration closes Feb 9 at 6:00 PM – Pre-Register to ensure there will be a map for your course

Lone Star Armadill-O 2023

Saturday, Feb. 11, 2023

Cooper Lake State Park, Sulphur Springs

Join us at Cooper Lake State Park (South Sulphur Unit) near the charming town of Sulphur Springs, TX. Come run on one of our newest orienteering maps created specifically for the National Interscholastic and Intercollegiate Championships in 2017. This year’s meet will revisit the eastern part of the park with headquarters in the scenic Heron Harbor Day-Use Area.

All park visitors will pay a $5 daily park entry fee at the gate, unless you’re staying overnight. In that case, you can visit the Texas State Parks Reservations page to reserve a campsite, cabin or screened shelter.

General Info

Event Officials

Meet Director: Ralph Courtney…. Meet director notes 
Course Setter: Stan Darnell …. Course setter notes 
Assisting School: Hebron High School (CDR Eduardo Morales)
E-Punch Coordinator: Mary Lynn Genovesi


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:  E-punch will be used to score all 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 on rare occasions had to cancel events due to high water or other extenuating circumstances.

Time Activity
9:00 – 10:30 am Registration open
9:00 – 9:30 am Boy Scout merit badge briefing
9:30-9:45 am Beginner’s Clinic – Open to All!
10:00 – 11:30 am Orienteers start on each course at one-minute intervals
10:30 am – 2:00 pm Results are calculated as runners finish and download
2:00 pm Courses close – Awards Ceremony
2:00 – 4:00 pm Control pick-up: Volunteer and get a little extra practice


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). 

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
NTOA (and other O club) members $15
Non-member $20
E-punch rental (All courses) $3
Day-of-race surcharge $3

Recreational Teams (2 or more people navigating together):

We love teams — orienteering is a great activity for families and friends. Teams aren’t eligible for awards, just the fun. The 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
Each Rec team (first 2 people) $17
Extra person (over age 8) — includes map $5
E-punch rental (All courses) $3

Competitive Teams (2 people navigating together):

New for this season: Competitive teams of two people, working together. Fee includes 2 maps. There’s a $3 surcharge for day-of-race entries. One e-punch required — bring your own or rent from us. In the dropdown labeled Competitor, select “Competitive Team” instead of Male or Female.

Comp Teams Cost
Junior Competitive Team (2 juniors) $20
Adult Member Competitive
Team (2 adults)
Adult Non-Member Competitive Team (2 adults) $40
E-punch rental $3

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.

Registration is Closed.

Competitive Individuals or Teams


Recreational Teams

Register Individual/Team

Register Group Members

Register Teams

Enter 1 competitive individual OR 2-person competitive team members.

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). 

See who’s registered

View by surname

View by organization

View by class

Download a Waiver


Driving Directions to Cooper Lake State Park:

From the west (Dallas): Take I-30 east to exit 101. Take TX-24 north for 11 miles through Commerce.  Turn right (east) onto TX-224, cross over TX-11, then turn right onto Park Street.  In a few hundred feet, turn left onto FM-71 and go east 16 miles to FM 3505 where you turn left (north). The park entrance is straight ahead.

From the east (Texarkana): Follow I-30 west to exit 127 at Sulphur Springs. Turn right onto TX-301 north, go about 3 miles northwest, turn right (north) onto TX-19.  Continue 6.8 miles north to FM-71, turn left (west). Go 4.2 miles west to FM 3505 where you turn right (north). The park entrance is straight ahead.

Note: You can also use Google Maps to navigate directly to Cooper Lake State Park from any direction. Be sure to specify South Sulfur Unit (not Doctor’s Creek Unit). Google will take you to the park accurately via some scenic country back roads. Event signage may be limited from certain directions, so follow signs for CLSP South Sulphur Unit.