The Loneliest Town in Idaho: Cascade, 96 Miles From the Nearest City
Cascade, ID — population 3,329, Valley County — is the most isolated inhabited place in Idaho. The nearest city of 10,000+ residents is Hamilton, MT, sitting 96 straight-line miles away — across the state line in MT. Idaho has 209 towns under 10,000 residents; Cascade is the most isolated among them.
The link opens the SimpleMapLab Map Radius Tool with a 50-mile circle drawn around Cascade. Try expanding the radius to see how far you have to look before encountering any 10,000+ city — the answer is roughly 96 miles in the direction of Hamilton.
Why this happened
Idaho's loneliest town sits in the central mountain wilderness — the largest contiguous roadless wilderness in the lower 48 states. Communities like Stanley, Atlanta, or Yellow Pine are surrounded by national forest and wilderness areas; the drives to any qualifying city are 100+ miles on winding mountain roads.
Central Idaho is the geographic anomaly of the lower 48: a region the size of Belgium with population around 5,000. The Frank Church–River of No Return Wilderness alone covers 2.4 million acres. Towns inside this region — historically mining camps or ranch settlements — are some of the most genuinely isolated places in the contiguous United States.
Idaho's 5 most isolated towns
The top 5 most-isolated inhabited places in Idaho, sorted by distance to the nearest 10,000+ city.
| # | Town | Pop. | Distance to nearest 10K+ | Nearest city |
|---|---|---|---|---|
| 1 | Cascade | 3,329 | 96 mi | Hamilton, MT |
| 2 | Tendoy | 191 | 90 mi | Hamilton, MT |
| 3 | Lemhi | 104 | 87 mi | Hailey, ID |
| 4 | Mccall | 7,750 | 84 mi | Payette, ID |
| 5 | Salmon | 6,590 | 81 mi | Hamilton, MT |
How Idaho compares
The states ranked closest to Idaho on this metric. Click any for the dedicated breakdown.
Draw your own radius
Open a 50-mile circle around Cascade →
Try the 100-mile radius to see whether a major city falls inside — for Cascade, it doesn't, because the nearest qualifying city (Hamilton, MT) sits 96 miles away.
More about Idaho
See the full breakdown of Idaho's counties at /states/idaho/counties — population, area, median income, and county seat for every county, plus a labeled printable map. The companion study 100-mile radius around Idaho's capital measures the share of Idaho's population that lives within day-trip distance of the capitol — an inverse framing of the isolation question this page poses.
Methodology (brief)
We aggregate the US Census ZCTA dataset by postal city, treating any (postal city, state) pair with ≥ 50 residents as a town. Anchor cities are places with ≥ 10,000 residents. For every Idaho town below the anchor threshold, we compute the straight-line distance to every anchor city in the US (cross-state distances count). The town with the largest minimum distance is Idaho's loneliest. Full methodology on the hub page.
Suggested citation: SimpleMapLab (2026). The Loneliest Towns in America: Idaho. Part of the Most Remote Inhabited Places study. Retrieved from https://www.simplemaplab.com/studies/most-remote-places/idaho. CC-BY 4.0.