Longmire Mineral Springs
Longmire Mineral Springs flows at 77 degrees within Mount Rainier National Park at 2,758 feet elevation, emerging 31.9 degrees above ambient just 132 meters from Longmire-to-Paradise Road. USGS analysis reveals sodium-chloride chemistry with 710 mg/L sodium, 940 mg/L chloride, and notably high calcium at 500 mg/L.
The springs emerge in old-growth forest along the Nisqually River valley on Rainier's southwest flank. Annual precipitation totals 90.2 inches with massive snowfall of 311.6 inches, supporting towering Douglas fir, western red cedar, and western hemlock. The historic Longmire area includes the National Park Inn, museum, and trailheads accessing Paradise and the Wonderland Trail.
Visit May through October when the Longmire-to-Paradise road is reliably open. Cougar Rock Campground sits 2.3 kilometers away with reservable sites. The mineral springs trail makes an easy addition to hikes toward Carter Falls or the Trail of the Shadows loop. Winter brings deep snow and road closures above Longmire.
James Longmire discovered these springs in 1883 while exploring the mountain, soon establishing a hotel and spa that attracted visitors seeking the waters' purported healing properties. His homestead became the park's first headquarters when Mount Rainier achieved national park status in 1899. The springs no longer support bathing facilities but remain accessible along an interpretive trail.
The water at Longmire Mineral Springs is slightly acidic (pH 5.8). It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sodium (supports circulation and skin hydration).
Some links are affiliate links. We may earn a commission at no extra cost to you.
Overview Cougar Rock Campground, on the southwest side of Mt. Rainier National Park, is conveniently located near Paradise. Individual campsites are reservable on this page. Group campsite reservations can be made via Cougar Rock Group Campground. Paradise is the most popular destination in the park, with a lodge and visitor center, many miles of hiking trails and a commanding view of the mountain-the highest in the state and Cascade range. The main attraction at Mount Rainier National Park...
Longmire Mineral Springs is road-accessible, so you can bring more gear.
As an Amazon Associate, we earn from qualifying purchases.
Springs Near Longmire Mineral Springs
More Springs Around 77°F
Slightly Acidic Springs (pH ~5.8)
Hike 6 waterfalls near Longmire Mineral Springs
Looking for more outdoor adventures? Explore waterfall hikes near Longmire Mineral Springs, Washington.