Lost River Idaho Map

About Lost River, Idaho

Lost River is a locality in Custer County, Idaho, United States. It is a small community with a population of 55. The population density is 2.4 people per km². Lost River is located at 43.6869°N, 113.6146°W. It observes the Mountain Time (America/Boise) timezone. ZIP code: 83251.

Lost River exhales a quiet resilience against the immense, rugged canvas of Custer County. It lies 80.6 miles west-north-west of Idaho Falls, ID (from Idaho Falls, ID: bearing 281°T), and is situated 16.1 miles west-north-west of Arco. The landscape here is a study in contrasts: vast, sun-bleached plains surrender to the muscular shoulders of the Pioneer Mountains, their peaks often dusted with the first whispers of snow even in early autumn. Sagebrush, tenacious and fragrant, clings to the dry earth, punctuated by the stoic silhouettes of juniper. A palpable stillness often settles over the valley, broken only by the sigh of the wind or the distant call of a hawk circling in the impossibly blue sky. The quality of light, particularly as the sun begins its descent, paints the mountains in hues of rose and deep violet, lending a dramatic grandeur to the otherwise austere beauty of Lost River. The story of Lost River is intrinsically tied to the earth and the promise of its bounty. Once a vital artery for miners seeking fortunes in the surrounding hills, its economy has since pivoted to the agricultural rhythms of the valley floor. Ranching and hay farming define the enduring character of Lost River, with sprawling pastures and golden fields stretching towards the horizon. The air, especially in the early morning, carries the clean, earthy scent of damp soil and ripening grasses, a testament to generations of labor. While the grand mining booms have long since faded, a spirit of self-reliance and community endures, a quiet legacy etched into the very soul of Lost River.

About This Lost River Map Page

This page provides an interactive Google map of Lost River, Idaho with street, satellite and terrain views and integrated Street View imagery. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Lost River and Custer County.

Detailed location data for Lost River includes the ZIP code (83255), telephone area code (208), county seat of Custer County (Challis), and school district assignment (Butte County Joint School District 111). These are among the most commonly searched location details for any US city or town.

Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Lost River is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.