Radio Orienteering

Amateur Radio Direction Finding (ARDF)

Welcome to Radio-O.  Here is how it works! We provide a radio receiver with a directional antenna, an orienteering map, a compass, and a finger stick. By pointing the antenna and listening to the signal you can determine the direction of the signal.  Using this information you navigate to the transmitter and punch in with your finger stick. Only the start and finish are marked on the map and it is important to keep track of where you are.  To qualify as finishing you must find at least one transmitter on your course and reach the finish within the time limit. To calculate results -- first; the number of assigned transmitters you found, then; your time on the course. We offer beginner through advanced courses, Regular BOK fees apply, and Pre-Registration is required.

Latest News in Radio Orienteering

March 24th, 2026

Orienteering & Radio-O at Gray Owl April 3rd, 4th, 5th, 2026

Ruth and I would like to welcome you to our house adjacent to the Birkhead Wilderness Area in the Uwharrie National Forest for a weekend of Radio Orienteering and Classic Orienteering. Below is a registration button and details of the weekend plans.

Some of this information will change. Be sure to check back just before the event for the update.

When:

  • Friday Noon – 10pm Apr. 3, 2026
    • Night-O 8:30pm – 10pm
  • Saturday 9am – 10pm Apr. 4, 2026
    • Pizza Dinner Saturday at ~4:30
    • Night-O 8:30pm – 10pm
  • Sunday 9am – 2pm Apr. 5, 2026
  • Control Pickup Sunday 2-4pm
    • Any help is greatly appreciated. The orienteering controls are needed for the following week’s Umstead event.

Where:

  • Asheboro, NC
  • 1725 Gray Owl Road
  • 35.6346680703153, -79.88024674672587
  • Directions: There is a control on our mailbox at the intersection of Hopewell Friends and Gray Owl Road. Drive 1/4 mile on Gray Owl and take the first left turn onto our driveway. Drive 1/4 mile to the turnaround. Turn around and park only on the right side (east side) of the driveway as you are heading back out. Do not drive on the grass at all! Do not park in the turnaround!

Orienteering Courses

The expert courses have a 1km walk to the start and finish at the house.

  • Explorer Beginner through Expert. Max 8k
    • The start and finish are at the house
    • The Explorer course consists of all the controls, beginner through expert. You take as many or as few of the controls as you like without a time limit. Just return before 4pm.
    • Beginner controls are 50-59
  • Orange 3k Advanced
  • Brown 3.6k Expert
  • Green 5.3k Expert
  • Red 6.7k Expert
  • Blue 8.9k Expert
  • Night
    • The Night course also includes all the controls, however there is a 1 hour time limit. You may start at or after 8:30 and must return by 10pm
    • The start and finish are at the house

Since Radio-O isn’t much fun if you know where the foxes are, you should do any radio-O courses before any Orienteering courses.

The Birkhead Hiking Challenge

This is a separate event piggy backing on the Gray Owl Weekend. You can check in and out and share the Pizza dinner Saturday evening (if you are back in time). You will need to download and print the PDF from a separate store product. Details are in this article. You do not need to register for the Gray Owl Weekend unless you intend to do one of the other courses.

Radio-O Courses

(Tentative Schedule subject to change)

Classic 80m

  • 9am-3pm Fri, Sat, Sun
  • 80m foxes 3.53
  • Beacon 3.60
  • 1k walk to start, finish at the house
  • Distances
    • 5 foxes 4.7k
    • 4 Foxes 3.4k
    • 3 Foxes 2.5k

FoxO 

  • 9am-1pm   Fri, Sat, Sun
  • 1-2  – 3.55 MHz
  • 3-5 – 3.57 MHz
  • Beacon – 3.6 MHz
  • Start and finish at the house
  • Distances
    • 9 foxes 5.4k
    • 6 foxes 3.7k

Sprint

  • 1pm-4pm   Fri, Sat, Sun
  • Slow 3.55
  • Fast 3.57
  • Beacon & Spectator 3.60
  • Start and finish at the house

Classic 2m

  • 9am-3pm Sat 5.5k
  • 1k walk to the start, finish at the house (different start from 80m)
  • Distances
    • 5 foxes 5.7
    • 4 foxes 4.1k
    • 3 foxes 3.1k

LiveLox

  • All the orienteering courses are in one event and the code is specific to your course.
  • Each of the Radio-O courses is considered a separate event
  • The radio-O LiveLox replay requires a password so you won’t accidently open them by mistake. You will get the code when you finish your radioO course.

Accomodations:

  • RV & Tent Camping – Zooland (6min from Gray Owl) https://zoolandfc.com/
  • Primitive Camping at Gray Owl
  • Hotels & AirB&B in Asheboro, NC


Event Directors: Joseph and Ruth

Resources for Beginners

Check out these videos. The first one is our 15 minute class. Then there are two short ones, one introducing an orienteering map, and the other how to use a Thumb Compass – which we can loan you to try out on your course.

Event Notes

Map Notes

There are lots of controls out there considering everything is on one map, so be sure to check the code on the control to be sure it is on your course.

Non Standard Symbols

The trees were mapped years ago, and are flat on the ground and mostly wouldn’t all be mapped at this time. So you should ignore big trees on the ground with branches still up in the air.

Note the upper bridge symbol where there isn’t any trail or bridge. This indicates an area that may be easier to cross especially during low water.

Note the lower bridge symbol around fallen trees. This indicates that you can cross on the trees if you are brave. Make sure the logs aren’t slippery before you cross in them.

Controls in the woods:

You are likely to see controls out there that aren’t yours. Here is what is out there

  • 80m foxes have regular controls with a diagonal blue stripe hanging with an ORANGE ribbon 181-185 3.560 MHz
  • 2m foxes have regular controls with a diagonal blue stripe hanging with a PINK ribbon 121-125 144.50 MHz
  • Orienteering controls have a vertical blue stripe
  • Sprint controls are striped poles with an SI-box on top. No flag.
  • FoxO controls are a black pole with an SI-box on top. No flag.
December 17th, 2025

Gray Owl 3 Day Results

What an awesome three days. Besides our regulars we had RadioO people from as far away as Oregon and Maryland. There were, however, some ups and some downs. One crazy thing that caused a bunch of trouble for the results was that the SI master that synchronizes all the controls was an hour off because […]

Read More
December 7th, 2025

3 day Radio-O & Orienteering Dec 12-14

Ruth, Dave, Matt K. and I are hosting a 3-day Radio-O and Orienteering event at our Gray Owl house in Asheboro NC.  Everyone is welcome. Be sure to check back here before you arrive, as details will be added as I set the courses.

The forcast for the weekend is clear sunny and cold. You can hang out in our house to keep warm when you aren’t out in the woods. Also, now we have a fire pit so you can warm up by the fire.

Radio-O

  • Friday 9am-3pm
    • full sprint – 1.6k Full power 3.56 & 3.58 MHz
  • Friday Noon-3pm
    • fox-O – Long 6k, Short 3.1k, 3.52 & 3.54 MHz
  • Saturday 9am-3pm
    • 2m classic course Full 5.9k, Short 4.3k, 144.50 Beacon 144.55
    • full sprint – 1.6k Full power 3.56 & 3.58 MHz
    • fox-O – Long 6k, Short 3.1k, 3.52 & 3.54 MHz
  • Saturday 4pm – 6pm Vegetarian Chili dinner
  • Sunday 9am-3pm
    • Classic 80m course Full 6.1k, Short 4.2k, 3.52 MHz
    • full sprint – 1.6k Full power 3.56 & 3.58 MHz

There is overlap between the radio-O and orienteering courses, so all the radio-O courses you are planning to do should be done before you do any of the orienteering courses except Sprint, which is completely separate.

Orienteering

  • Friday 10am – 3pm
    • 1hr, 2hr, and 4hr Score course (advanced – expert, i.e. Orange – Blue).
    • White and Yellow level Explorer Orienteering course
  • Friday and Saturday 7pm – 8pm 1 hour Night Course
    • 7pm Mass Start Must return by 8pm
    • 2 point penalty every minute past 8pm
  • Saturday and Sunday 9am – 3pm
    • 1hr, 2hr, and 4hr Score course (advanced – expert, i.e. Orange – Blue).
    • White and Yellow level Explorer Orienteering course
  • Saturday 4pm – 6pm Vegetarian Chili dinner
  • Birkhead Hiking Challenge. Details here.
    • Saturday: Start window 6:30 am to 12 pm noon 24 hour 64k

Saturday Evening we will have dinner at our house, and camping is available on our property and nearby commercial campgrounds.  Hotels are available within 15 minutes of Gray Owl.

Location & Directions: 1725 Gray Owl Road, Asheboro, NC. (35.634843, -79.881873) There is a control on our mailbox at the intersection of Hopewell Friends and Gray Owl Road. Drive 1/4 mile on Gray Owl and take the first left turn onto our driveway. Drive 1/4 mile to the turnaround, turn around and park only on the right side (east side) of the driveway as you are heading back out. Do not drive on the grass at all! Do not park in the turnaround!

September 29th, 2025

Fall Radio-O Beginner Classes

Learn radio orienteering (aka, ARDF) as the pros learned it. Experience the no-frustration step-by-step approach by which many have learned the sport.

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July 1st, 2025

Results: 2025 USA Radio Orienteering Championships

The 24th US Radio Orienteering Championship

In Central North Carolina from June 14 – 22, 2025

2025 USA Championships Radio-O Results

FoxO Results

FoxO Master Map

FoxO Livelox Event

Sprint Results

Sprint Master Map

Sprint Livelox Event

2m Results

2m Master Map

View Livelox Event

80m Results

80m Master Map

80m Livelox Event

Bulletin 2 has all the details that were added throuout the event.

Basic Schedule

  • Practice Days
    • Saturday & Sunday, June 14-15, 2025 – FoxO & Sprint
    • Monday, June 16, 2025 – 2m & Sprint
    • Tuesday, June 17, 2025 – 80m & Sprint
  • Equipment Check, Pre-Event Meeting & Pizza Dinner
    • Wednesday, June 18, 2025 – All transmitter types
  • Championship Races
    • FoxOring – Thursday, June 19, 2025
    • Sprint – Friday, June 20, 2025
    • 2m – Saturday, June 21, 2025
    • 80m – Sunday, June 22, 2025
  • Late fees begin May 1 ($5 per day)