On remote highways, the next pump can be hours away, and hoping is not a plan. Here is a step-by-step method for mapping fuel stops before you leave.
Road notes
- The 239 miles between Coldfoot and Deadhorse on Alaska’s Dalton Highway is the longest documented gas-free stretch on a U.S. public road.
- Plan with real-world fuel economy, not the sticker figure, because gravel, wind, grades and idling all cut your usable range.
- Confirm that every fuel town on your map is real, open and selling the fuel you need before you depend on it.
- Set a reserve rule at home, such as topping off at a quarter tank, and honor it on the road even when the map says you could push on.
- Rentals need conservative range estimates and a fuel-policy check, while EVs need charger locations and a bigger buffer planned in advance.
On most American highways, fuel planning means glancing at the gauge and taking the next exit. That habit falls apart on routes where the next exit with a pump is 150 miles away, and it fails completely on a few famous stretches where the gap dwarfs anything a daily commute ever asks of a tank. The fix is to treat fuel stops as part of the route, worked out at a kitchen table with a map instead of guessed at from the driver’s seat. Here is the method, step by step.
Step 1: Find the Long Gaps Before You Leave
Long fuel gaps are not rare, and they are not only in Alaska. Some of the best-known examples:
- The Dalton Highway, which runs 414 miles from Livengood to Deadhorse, Alaska. Coldfoot sits at Mile 175, and the next public pump is at Deadhorse, Mile 414. That 239-mile run is the longest documented fuel-free stretch on an American public highway, and a sign north of Coldfoot puts the distance to the next services at about 240 miles.
- Nevada’s US 50, tagged the “Loneliest Road in America” by Life magazine in July 1986. A 287-mile stretch crosses high desert where services cluster in a handful of towns, and the Nevada section of the route can run 375 to 500 miles depending on where you join and leave it.
- The Natchez Trace Parkway, 444 miles through Mississippi, Alabama and Tennessee, deliberately kept free of billboards and heavy traffic. You will not find gas stations on the parkway itself, so fueling means leaving it.
- Even the interstates have long single-state runs. Interstate 90 covers roughly 550 miles across Montana, its longest stretch in any one state.
Fuel gaps and rest-stop gaps do not always match, but both matter on the same roads. The corridor between Belfield, North Dakota and Mitchell, South Dakota runs about 450 miles with no public restrooms along the way, roughly seven hours of driving at average speeds. Small towns along such stretches are the escape hatch, which is exactly why you should find them on the map before you need one.
The method itself is simple. Lay the route out on a mapping app, search for gas along the line, drop a pin at every town that shows a station, and write down the mileage between pins. Flag any gap longer than a third of your comfortable range for the extra planning that follows.
Step 2: Figure Your Real Range, Not the Sticker Range
Sticker fuel economy comes from a standardized test. Your loaded car at interstate speed, with a headwind and a carrier on the roof, will do worse. Plan with a conservative number instead of an optimistic one.
The Dalton gap shows why the margin matters. A vehicle getting 25 miles per gallon needs almost 10 gallons to cover those 239 miles under ideal conditions, and ideal conditions do not last on the Dalton. Gravel makes the engine burn extra fuel just to keep moving, open sections catch the full force of the wind, roadwork can leave vehicles idling, and the climbs through the Brooks Range work the engine harder still. The same forces are at work on any remote two-lane: desert highways invite steady high speeds, mountain passes claw back mileage on the climb, and a fully loaded family car burns more than an empty one.
To find your usable range, take the tank’s capacity, subtract a gallon or two that the pump may never actually reach, and multiply by a real-world figure drawn from your own fill-up records or a trusted source for your specific vehicle. If your records say 26 mpg, plan on 24. Write the resulting number on a note stuck to the dash or visor. Tired, on a road with no towns, you want the math already done.
Step 3: Mark Fuel Towns and Check Their Hours
A pin on the map is a hypothesis, not a guarantee. On the Dalton, maps published by the Bureau of Land Management list only three places with fuel: Yukon Crossing, Coldfoot and Deadhorse. Past Coldfoot, nothing comparable appears until the road’s northern end. Three pins carry the entire road. If one of them is dark when you roll through, the arithmetic changes fast.
So check every pin before you leave:
- Confirm the station still operates. Remote fuel listings can be years old, so look for recent reviews, the town’s chamber of commerce page or the station’s own listing.
- Check the hours. Small-town stations often close in the evening or on Sundays, and some rural pumps are card-only after hours. A station that shuts at 6 p.m. is not a stop for a driver arriving at 9.
- Note what it sells. If your car needs diesel or premium, a lone rural station may carry only regular gasoline.
Nevada promoted a Highway 50 survival guide after the “Loneliest Road” article appeared, complete with maps and lists of services and facilities in the five towns along the way. That instinct is exactly right. Towns that live on through-traffic usually publish what they offer, and it takes minutes to use that information.
Step 4: Build In a Reserve for Detours and Closures
Fuel gaps are calculated on a map. The road does not always cooperate.
Closures are the obvious problem. The Beartooth Highway, 68 miles of switchbacks between Red Lodge and Cooke City in Montana, is generally drivable only from May to October, and snow or high winds can close it briefly at any time of year. A closed pass means a long detour on roads you never fueled for. Rough surfaces cost fuel too: some stretches of Route 66, particularly in rural areas, are poorly maintained or unpaved, and that drag adds up the same way gravel does on the Dalton.
The fix is a reserve rule set at home and enforced on the road. Many remote-route drivers treat a quarter tank as their working empty: when the gauge touches the line, they top off at the next open station, even if the map says they could go farther. Alaska transportation officials advise carrying extra fuel on the northern half of the Dalton, the extreme version of the same idea. On ordinary remote highways, topping off early costs minutes. Running dry costs a tow.
Careful
Never start a long gap with less fuel than the gap plus your reserve. There is no bail-out in the middle of the stretch, and weather or roadwork can stretch the miles further than the map promised.
Step 5: What to Do When a Station Is Closed or Out of Fuel
Even a checked plan can hit a locked gate across the pumps. The mistake to avoid is pressing on toward the next town on hope.
- Stop and reassess while the gauge is still above your reserve. Deciding things in a station parking lot beats deciding them on a desert shoulder.
- Ask. Station attendants, cafe staff and local deputies usually know which town has a reliable pump and which one runs dry on busy weekends.
- Recalculate honestly. If the next planned stop is beyond your range with the reserve intact, turn back to the last fuel you saw. Backtracking feels like losing, but it beats walking.
- If the needle wins anyway, get off the road safely, make the car visible and treat it as a breakdown.
A spare can of fuel is a reasonable precaution on the most remote routes, carried and stored properly, and used only to reach the next station rather than to stretch the day’s drive.
Step 6: Special Rules for Rentals and EVs
Rentals add a layer, because you are running an unfamiliar car on borrowed assumptions. A rental’s dashboard range estimate reflects that model’s settings, not your luggage or your speed. Pick up the car, fill it, note the tank capacity, and use a conservative fuel economy figure until your first fill-up tells you the truth. Check the fuel policy at pickup as well, since returning the car with a full tank is usually the simplest arrangement. Our guide to renting a car for a road trip covers mileage limits, fees and the fuel questions worth asking.
Electric cars change the math entirely. Charging takes longer than filling a tank, chargers are scarcer in exactly the places where gas stations are scarce, and cold weather cuts range further. An EV plan needs charger locations, connector types, charging speeds and a larger buffer than a gas plan. Our article on electric car road trip charging walks through that planning in detail, and the core rule carries over: never leave a charger without enough charge to reach the next one plus your reserve.
Step 7: A Pre-Departure Fuel Plan Checklist
Run through this the night before you leave:
- Route mapped with every fuel town pinned and the mileage between pins written down.
- Real-world fuel economy recorded and the usable range calculated, on a note in the car.
- Hours checked for every station inside the long gaps, especially any stop scheduled for an evening or Sunday.
- Fuel type confirmed at each stop if your car is picky.
- Reserve rule chosen, a fixed gauge reading or a fixed miles-remaining figure, and a promise to honor it.
- Detour plan sketched for known seasonal closures on the route.
- Offline maps downloaded and the plan shared with someone at home, since some remote highways run for hours without cell signal.
- Tank full at the last sizable town before the first long gap, whatever the gauge says.
None of this takes more than an hour at the kitchen table, and it is the hour that separates a good story about the empty miles from an expensive cautionary tale.
Once the fuel plan is set, the rest of the budget falls into place. Our guide to road trip fuel math covers budgeting gas alongside tolls and the other costs that pile up, and if your route follows mountain passes or coast roads, our guide to planning a scenic byway trip covers the roads where these long fuel gaps tend to live.
Questions from the road
Q: How far can I drive on one tank on a remote highway?
A: Multiply your tank capacity minus a gallon or two of unusable fuel by a conservative miles-per-gallon figure from your own records. Planning with an optimistic sticker number is how drivers end up short on long gaps.
Q: Where is the longest stretch of highway with no gas stations in the U.S.?
A: The Dalton Highway in Alaska. Coldfoot sits at Mile 175 and the next public pump is at Deadhorse, Mile 414, a 239-mile gap. A roadside sign near Coldfoot puts the distance to the next services at about 240 miles.
Q: What should I do if a gas station on my route is closed?
A: Stop and reassess before the gauge drops below your reserve, ask locals which nearby town has a reliable pump, and recalculate honestly. If the next stop is beyond your range, turn back to the last fuel you saw.
Q: Do electric cars need a different fuel plan on remote routes?
A: Yes. Charging takes longer than filling a gas tank, chargers are thinner in remote areas, and cold weather cuts range. Plan charger locations, connector types and a larger buffer, and never leave a charger without enough to reach the next one.
Road rules, fees, closures and border requirements change. Check with the state transportation department, park, rental company or border agency before you travel. This guide is general information.
