Background Image (Sagavanirktok River on the North Slope)

Dalton Highway (Haul Road) Corridor Map for GPS and Google Earth

The area around the Dalton Highway (aka Haul Road) in northern Alaska is popular for caribou, moose, bear, and sheep hunting, but it's illegal to hunt with a firearm within 5 miles of the road (the "Dalton Highway Corridor" area), so gun hunters have to walk out 5 miles.

Normally, it's hard to be sure where that 5-mile boundary is. With this map on your GPS, it's easy.

What's in this map File formats included

Purchase the map for only $19.95 with your credit card or PayPal account.

The transaction is handled by PayPal and file delivered by Payloadz, so it's all safe and secure. You'll receive a zip file containing the map in both file formats.

This download includes the colored boundaries and waypoints shown below. It does not include the base maps -- it's intended to be used on top of the ones you already have.

Google Earth version, zoomed out. Red lines indicate the boundaries of the 5-mile corridor, the Prudhoe Bay Closed Area, and Gates of the Arctic National Park. The green line is the Itkillik Preserve in Gates of the Arctic.
GPS version, shown over Garmin's world basemap in their BaseCamp program. Red lines indicate the boundaries of the 5-mile corridor, the Prudhoe Bay Closed Area, and Gates of the Arctic National Park. The green line is the Itkillik Preserve in Gates of the Arctic.

Why you should have this tool

Picture yourself stalking across the North Slope, legs aching after about 5 miles of bowling-ball-sized tussocks. Your eyes scan the tundra for caribou with that intensity of focus only a hunter knows. As you climb yet another rolling hill, you spot the arcs of a bull's main beams skylined on the ridgetop. He's huge. You forget to breathe for a second.

Caribou on the North Slope You will never forget that moment.

What follows depends on your preparation. Your GPS shows you've walked over 5 miles, but your path and the road both curved, and you aren't positive you're outside the corridor to take a legal shot. You're probably legal, but "probably" isn't enough. You need certainty. You might fiddle with a paper map, or your GPS's cumbersome measurement feature, as buck fever sets in and your trophy slips away. You might give up and wish the caribou were another mile out, where you'd be more confident. Or, perhaps, you bought this map right now. You take one look at a clear, simple line on your GPS and know you're a solid quarter mile outside the corridor. The stalk begins.

If your hunt brings an opportunity like this, you don't need to spend precious time figuring out the legality, when you can safely be certain in a moment with this map.

Suppose you encountered a caribou at the "What if?" waypoint above. Perhaps you found it there. Perhaps you followed it from somewhere inside the corridor. How would you know if and when it's legal?

Precision and construction details

The boundary lines are made of points spaced roughly every 50 yards, and each point is between 5 miles 50 feet and 5 miles 68 feet from the nearest point on the midline of the road. The 50 foot cushion from the midline represents half the legal width of the road, and the other 18 feet account for the maximum possible geometric error in the calculation.

The data for the road midline is publicly available survey-grade GPS data from the Alaska Department of Transportation, via the Alaska Geospatial Data Clearinghouse. Based on that midline, the 5-mile corridor boundary was calculated using a proprietary algorithm (it's a much more difficult math problem than it seems).

This close-up of the area near Galbraith Lake shows one of my favorite ways to plan a hunt on Google Earth, using the USGS topo maps available as a Google Earth layer from Alaska's Statewide Digital Mapping Initiative. Two overlays from the corridor map download are visible: the corridor boundary itself (thin red line) and the boundary of the Itkillik Preserve in Gates of the Arctic (thin green line).

Notice how irregular the corridor boundary is here, in one of the many places where the road curves a lot. That's why it's so difficult to know where it is without this download.

Installation and usage tips

These maps should work with any modern GPS software. I can't provide instructions for all of them, but it should be very easy if you have basic familiarity with how to work with tracks and waypoints. Here are the basics in the software I use:

Start by unzipping the download and putting the .GPX and .KMZ files wherever you want to keep them.

Google Earth
  1. From the File menu, choose Open, and select the .KMZ file from the download.
  2. The folder "Dalton Hwy Hunting Map" should show up under "Temporary Places."
  3. Right-click it and choose "Save to My Places."
Garmin Basecamp (other GPS software should be similar)
  1. From the File menu, choose Import, and select the .GPX file from the download.
  2. Under "My Collection" on the left side of the screen, choose "Recently Imported from Dalton Hwy..."
  3. From the "Edit" menu, choose "Select All"
  4. Click & drag (or copy & paste) the selected tracks and waypoints onto the permanent collection you want.
  5. With your GPS unit connected, repeat the above step to drag them onto the GPS unit itself.
  6. Double-check that you loaded them correctly before you leave home!
In the field


Again, the map is just $19.95

All proceeds go directly into my sheep hunting gear fund!

Questions? Comments? Email me.