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I-84: Ontario, OR border → Snowville, UT border

Two hundred eighty-one miles from the Oregon border to Utah, crossing the Snake River Plain. Boise is the charging center of the state. East of Twin Falls, this corridor gets sparse fast.

281
miles
11
fast stops
103
mi · longest gap
4,600
ft · summit
Route overview

By the numbers.

Miles
281
Stations
11
Highest Elevation
4,600 ft
Best Season
April to October
Winter Advisory

This corridor needs a plan in winter.

The Snake River Plain doesn't have Cascade- or Rockies-style mountain passes, but it gets genuinely cold winter weather — sub-zero overnight temperatures around Boise and Twin Falls are routine in January, and fog along the Snake River can sit for days. The 100-mile stretch east of Burley to the Utah border has no fast charging at all. In winter, that gap costs more range than the mileage suggests. Charge fully in Burley and don't plan to arrive at the Utah border with less than 20% remaining.

The corridor

Every stop, start to finish.

Plotted west to east. Scroll the route — each station lights up as you reach it.

MILE 0 START
85
Ontario, OR border / Fruitland
Multi-network · 350 kW max · 4 stalls
CCSNACS
The Idaho side of the Oregon border crossing. A Tesla Supercharger in Fruitland mirrors the one in Ontario on the Oregon side — either covers the crossing. See our <a href="/oregon/i-84/">Oregon I-84 guide</a> for the route west of here.
MILE 9
85
Caldwell
Multi-network · 350 kW max · 4 stalls
CCSNACS
Caldwell is the first real town on the Idaho side, part of the Boise metro's western edge. An EVgo site here is a reasonable stop if Fruitland was busy, but most drivers will push on to Boise, 20 minutes further.
MILE 30
85
Boise
Multi-network · 350 kW max · 4 stalls
CCSNACS
Boise is the charging center of Idaho by a wide margin — a Tesla Supercharger, an Electrify America site, and an EVgo location all within the metro. This is the place to charge fully regardless of your battery level, because the next 200 miles get progressively sparser.
MILE 48
85
Mountain Home
Multi-network · 350 kW max · 4 stalls
CCSNACS
A smaller Tesla Supercharger serving Mountain Home Air Force Base and the surrounding town. Useful as a buffer stop, but Boise's redundancy means most drivers won't need it unless they're running low.
MILE 95
85
Glenns Ferry / Hagerman
Multi-network · 350 kW max · 4 stalls
CCSNACS
This stretch follows the Snake River through farm country, with the Snake River Canyon and the Thousand Springs area nearby. An EVgo site in Hagerman is the only fast charging in this segment — worth knowing about even if you don't need it, since it's easy to miss.
MILE 141
85
Twin Falls
Multi-network · 350 kW max · 4 stalls
CCSNACS
Twin Falls is the last real charging hub before the Utah border, with both an Electrify America site (live) and a Tesla Supercharger. Shoshone Falls and the Perrine Bridge over the Snake River Canyon are worth a stop if you have time. <strong>This is the last good charging for 140 miles.</strong> Top off fully here regardless of where you're headed next.
MILE 168
85
Jerome
Multi-network · 350 kW max · 4 stalls
CCSNACS
Idaho Power's NEVI-funded site in Jerome went live in March 2026 — one of the first NEVI awards in the state to actually open. It's a short detour from Twin Falls and adds redundancy to an area that badly needed it, but doesn't change the calculus for the long gap ahead.
MILE 178
85
Burley
Multi-network · 350 kW max · 4 stalls
CCSNACS
Burley's Tesla Supercharger is the last fast charging before Idaho's southeastern corner empties out. From here, I-84 continues through Declo and across open range toward the Utah border with no fast charging in between. <strong>Do not leave Burley without a full charge if you're continuing east.</strong>
MILE 281 LONGEST GAPFINISH
0
Snowville, UT border
No fast charging · — · 0 stalls
The Utah border. There is no charging at the crossing itself — the nearest fast charging is in Utah, well south of here. This 100-mile stretch from Burley is the longest no-charging gap on any corridor we cover in Idaho. If you're driving an EV with less than 250 miles of real-world range, plan a different route or accept that this leg requires careful margin management.
About this route

The drive, in detail.

I-84 across Idaho follows the Snake River Plain, and the charging picture follows the population. Boise has real redundancy — a Tesla Supercharger, Electrify America, and EVgo all within the metro. Twin Falls, 110 miles further east, is the last meaningful hub. East of Burley, the corridor runs 100 miles to the Utah border with no fast charging at all.

That gap is the headline for this corridor. It isn’t a mountain pass and it isn’t dramatic — it’s flat, open range country, and on a clear summer day it’s an easy drive. In winter, with cold temperatures and cabin heat running, it’s the kind of stretch that turns a 250-mile-range EV into a genuinely tight margin. The fix is simple: charge fully in Burley, and don’t treat the Utah border as a charging option, because it isn’t one.

The one bright spot is Jerome, where an Idaho Power NEVI site went live in March 2026 — a small addition, but one of the first NEVI awards in the state to actually open rather than sit in the pipeline. Twin Falls and Jerome together give the western half of this gap some redundancy, even if the eastern half remains a real planning consideration.

This guide runs west to east, from the Oregon border to Utah. If you’re continuing west, the Oregon I-84 guide picks up the Columbia Gorge and Blue Mountains stretch. For the rest of what’s happening with charging in Idaho, see the Idaho EV charging hub, and for help planning the rest of your trip, see our EV road trip planner.