Entry No. 63 — the Boise file — filed under: ruins
Adelmann Mine
Located in the Boise foothills, the Adelmann Mine is a historic gold mining site established in the early 1900s by German immigrant Richard Adelmann. The most prominent remnant is a remarkably well-preserved, multi-story wooden ore mill nestled in a rugged gulch. While the mine's underground tunnels are sealed, the weathered timber structure stands as a striking relic of Idaho's gold rush era.
The story
In 1902, German immigrant and former Civil War drummer boy Richard Adelmann put his name on a landmark brick building at Idaho and Capitol in downtown Boise. But his bigger gamble sat five miles east up a gulch in the Boise foothills. By 1907, Adelmann was quietly driving tunnels into the Black Hornet mining district, hunting gold and silver ore. The operation never delivered the massive fortunes he hoped for, but what survived the quiet bust is a massive, multi-story wooden ore mill hanging on the steep hillside of Shaw Mountain.
Most boomtown timber structures in Idaho burned down or collapsed into splintered kindling decades ago. The Adelmann mill somehow held together, its heavy weathered frame and timber floors clinging to the canyon wall like a ghost town frozen mid-shift. The underground mine shafts have been permanently sealed, but the colossal wooden skeleton sits completely exposed to the sagebrush, red-tailed hawks, and harsh canyon winds.
What it's like
You will park in a small dirt pull-off along Highway 21 near the Boise River Wildlife Management Area depot and slip through a pedestrian gate. The trail is an unshaded 4.7-mile round-trip grind up an unpaved service road that bakes in the afternoon heat—start early in the morning with plenty of water and sun protection to beat both the sun and the weekend crowds that fill the small lot. When you round the final bend in the gulch, the five-story graying mill appears suddenly, wedged right into the gulch wall. The structure is heavily rotted and structurally unstable, so stay on the dirt path, shoot photos from the outside, and watch your step for loose rusted metal around the site.
The move: Embark on a scenic, moderately challenging 4.7-mile round-trip hike from the Boise River Wildlife Management Area to photograph the impressive wooden mill from the safety of the trail.
📍 Before you go The trail is on public land managed by the BLM and Idaho Fish and Game, but the historic wooden mill structure is structurally unstable and unsafe to enter, and the mine shafts are sealed.
- 📍 Adelmann Mine
- 💸 Free
- ⚡ Low-key
- 🌗 Outdoors
Where: Adelmann Mine, Idaho 83716, USA
Hours: Added 2026-07-20 — confirm current access before you go.
Pair it with
- Black Hornet Mine — Double down on the area's forgotten gold history by checking out another 1890s operation located less than a mile away in the same mining district.
- Idaho Museum of Mining & Geology — Trade the sun-baked, decaying timber mill for an indoor deep dive into the rocks, minerals, and gear that fueled Idaho's gold era.
- Old Idaho Penitentiary — Drive five miles down Highway 21 to explore the stone walls of a harsh territorial prison built during the same 19th-century boom era.
Good to know
How long and difficult is the hike to Adelmann Mine?
It is a 4.7-mile round-trip out-and-back hike along an unpaved road with roughly 1,200 feet of continuous elevation gain.
Can you go inside the wooden mill or mine tunnels?
No. The underground tunnels are sealed shut, and the multi-story wooden mill is rotting, unstable, and unsafe to enter.
Do you need a permit or entrance fee to hike here?
No fee or permit is required. The trail crosses public land managed by the Bureau of Land Management (BLM) and Idaho Fish and Game.
Are dogs allowed on the trail?
Yes, dogs are allowed on a leash, but keep in mind that the trail has zero shade, hot dirt, and sits in active wildlife habitat.
Plan a visit & invite your people →
Further reading: abandonedidaho.com · ktvb.com · idahotrailsassociation.org
last checked: 2026-07-20