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Land Buying Guide

How We Find Property Lines on Mountain Land — A Working Realtor's Trick

Walking property lines on White Mountains land? Here's the app we use in the field, what it gets right, and where it falls short.

WKWes & Keri Reidhead
West USA Realty
May 5, 2026 6 min read

I was out walking a piece of acreage with a buyer the other day, and we hadn't been on the property five minutes before he asked the question every land buyer asks me sooner or later: "Where are the corners? Where do the lines actually run?"

Fair question. And on a flat suburban lot with a fence and a sidewalk, it's an easy one. Out here in the White Mountains, it's not. You've got pines and junipers thick enough that you can't see fifty feet ahead of you, no curb, no stake you can spot from the road, and half the time the only "marker" left is a rusted T-post some rancher drove in twenty years ago. So when somebody is about to spend real money on land, "we think the line is over there somewhere" doesn't cut it.

This is the part of the job a lot of agents skip. They'll show you the listing photos, point in a general direction, and call it good. Keri and I do it differently because we actually go on this land ourselves — to hunt, to camp, to scout. We want to know exactly what we're buying, and we want our buyers to know too.

So here's the trick I've leaned on for years now.

The app I keep on my phone for this exact problem

I use OnX Hunt. It was built for hunters who need to know whether they're standing on public land, state trust, or about to step onto somebody's private parcel and get yelled at. But it turns out the same thing that makes it useful for hunters makes it really useful for buyers walking raw land.

When I open it on a property, the parcel boundaries are right there on the map. Real lines, real corners, overlaid on satellite imagery. As I walk, my little blue dot walks with me in real time. So instead of guessing where the line is, I can literally watch myself approach it, hit it, and step across it.

When I'm walking the property lines with a buyer, it walks with us in real time.

That changes the whole conversation. A buyer can stand on what they think is "their corner" and actually see whether it is.

The 10 to 15 foot reality

Here's where I'm going to be straight with you, because I'd rather you hear this from me than figure it out the hard way.

The app is usually about 10 to 15 feet off.

That's not OnX being sloppy — that's just what consumer GPS does, especially under tree cover. The satellites are talking to a phone in your pocket through a forest canopy, so you're going to drift a little. On a 40-acre parcel, 10 to 15 feet doesn't matter much. You know which side of the line you're on. You know roughly where the corner sits.

But if you're trying to figure out whether a shed is two feet inside the line or two feet over it, or whether that big ponderosa belongs to you or your neighbor — the app is not the answer. That's where I tell every buyer the same thing: if you're going to build, fence, or fight over it, hire a licensed surveyor. Period. The app gets you 95 percent of the way there for a walkthrough. A surveyor gets you the legal answer.

When the GPS won't even find the address

This one bites people more than you'd think. A buyer texts me an address from a listing, plugs it into Google Maps or Apple Maps, and gets dropped two miles down a forest road at a closed gate. Or it says the address doesn't exist at all. Out here, that's normal. A lot of these parcels have addresses that were assigned years ago and never made it into the GPS systems people actually use.

Here's what I do. I open OnX, find the parcel on the map, and pull the coordinates straight off it. Then I copy and paste those coordinates into my truck GPS or my phone's maps app, and now it's routing me to a real point on the ground instead of arguing with me about whether the address exists.

It sounds like a small thing. It is not a small thing. It's the difference between meeting a buyer at the property and meeting them at a wrong gate while they're losing patience with the whole process.

Looking up who owns what next door

The other piece I use constantly: the parcel data itself.

Tap a parcel on the map and OnX will show you who owns it, how many acres it is, and a few other details depending on what's been updated. So when a buyer asks me, "Who owns the land next to this?" I can pull it up right there. Same goes for the parcel across the road, the one wrapping behind, the big chunk that the listing parcel is bordered by.

I can find the property owner, how many acres they own, and who owns the property next to the property we're looking at.

This matters more than people realize when they're buying mountain land. Your neighbor on a 40-acre parcel is your neighbor in a way a suburban neighbor isn't. If the parcel next door is held by the state, that's one story. If it's owned by a cattle outfit that has grazed the same draw for fifty years, that's a different story. If it's owned by a developer, that's another story entirely. None of those are bad, but they're all different — and a buyer deserves to know before they sign anything.

What this won't do

I want to keep this honest, because that's how Keri and I try to run this business. The app is a tool. It is not a survey. It is not a title report. It will not tell you about easements, water rights, road maintenance agreements, or whether a neighbor's well is sitting on what's now your dirt. Some of that information you get from title. Some of it you get from talking to neighbors. Some of it you only get from a surveyor with a transit and a chain.

What the app will do is keep you from walking the wrong forty acres, keep you from buying land based on a vague wave of a hand, and give you a fighting chance of understanding what you're actually looking at before you write an offer.

If you want help walking a piece of land in person

If you're shopping land in the White Mountains and you want somebody who'll actually walk it with you instead of pointing from the truck, that's what we do. We'll bring the app, we'll bring the boots, and we'll be straight with you about what's a deal and what's a headache waiting to happen. Reach out through our contact page and we'll set up a time to get out there together.

See you down the trail.

— Wes

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