Photo by Dankarl, via Wikimedia Commons (Public domain)
🇺🇸 USA · Seward Peninsula, Alaska
Photo by Dankarl, via Wikimedia Commons (Public domain)
🇺🇸 USA · Seward Peninsula, Alaska
♨ Temperature
50°C
⛰ Altitude
45 m
⚗ pH
8.4
💧 TDS
360 mg/L
🌊 Flow rate
20 L/s
📅 Established
Pre-colonial
✓ Verified on 2026-07-22
Pilgrim Hot Springs is a geothermal site on the Seward Peninsula of western Alaska, accessible only by bush plane, snowmobile, or ATV depending on season. The hot springs — with water emerging at temperatures up to 50°C — create an extraordinary microclimate in the surrounding tundra: trees and vegetation grow to heights unusual for the sub-Arctic latitude, forming a lush anomaly in the otherwise open permafrost landscape. The site was used by indigenous Inupiaq communities for centuries, and in the early 20th century a Catholic mission and orphanage were built here, taking advantage of the springs for heating and the unusual growing conditions for food. The abandoned mission buildings remain on site.
| Sodium | 95 mg/L |
| Bicarbonate | 210 mg/L |
| Silica | 55 mg/L |
| Fluoride | 2.1 mg/L |
The Seward Peninsula's geothermal springs were integral to the life of Inupiaq communities for thousands of years before European contact. Pilgrim Hot Springs was identified by early missionaries as an ideal mission site precisely because the hot springs created a temperate microenvironment — what one early missionary called 'a small paradise in the Arctic tundra.'
The abandoned Catholic mission gives Pilgrim Hot Springs a haunted historic character unlike any other thermal site in North America. The juxtaposition of natural hot springs, failed colonial enterprise, indigenous heritage, and Arctic wilderness creates a complex and deeply atmospheric destination.
The site is currently managed by the Unalaskeet Native Village and regional authorities with access tightly controlled. Geothermal energy development potential is being studied as a renewable energy source for nearby Nome, though conservation advocates have called for the hot springs to be protected as a heritage and natural site.