Hiking & Trails

This abandoned mine site once held gold. Now it’s a scenic hiking spot near Boise.

A beginner’s guide to safe and happy hiking

Following a remarkably dry spring, hiking season is already upon us in the Northwest. This video provides some simple advice to make your journey more enjoyable.
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Following a remarkably dry spring, hiking season is already upon us in the Northwest. This video provides some simple advice to make your journey more enjoyable.

Editor’s note: The Bureau of Land Management urges the public to stay away from abandoned mine sites. “We understand the temptation to explore, but these sites pose hidden risks including collapsing structures, lack of oxygen, sinkholes and left behind chemicals and explosives,” a BLM spokesman told the Statesman.

Learn more about the safety concerns here.

Just a few minutes’ drive from Boise, tucked near Lucky Peak, lies a relic of Idaho’s past. Once a gold mine owned by a prominent Boise businessman, the site is now a destination for hikers seeking a little solitude and a taste of history.

Information on Adelmann Mine, named for owner and Boise businessman Richard C. Adelmann, is sparse. Hiking website AllTrails labels the trek “Alderman Mine,” and there are no trail markers or signs to assure you that you’re headed in the right direction.

But the hike, which comes in around 5 miles round trip, is a moderate one if you know where to start.

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The first mile of the Adelmann Mine trail is on a packed dirt service road on the Boise River Wildlife Management Area. Nicole Blanchard nblanchard@idahostatesman.com

A steep ascent and scenic views of Boise Mountains

The unofficial trailhead to Adelmann Mine is at the Boise River Wildlife Management Area headquarters off of Idaho 21. The entirety of the hike is on land owned by the Bureau of Land Management, though Idaho Fish and Game manages the area, which is crucial wintering range for mule deer and other Foothills wildlife.

Krista Biorn, a wildlife biologist who manages the Boise River WMA, advises hikers to park outside the gate that leads to the headquarters to avoid having their vehicles locked inside. From the gate, head west across the property and past the WMA buildings to follow the dirt road back into the hills.

The first mile of the hike is a cinch. You’ll follow a packed-dirt service road, with meadows on either side of you.

There’s one unpleasant bit — the WMA is home to a roadkill pit where IDFG leaves animal remains to decompose or be cleaned up by predators. The trail passes that pit around the 1-mile mark, so if you’re squeamish, be prepared. The smell wasn’t bad on a cool May evening when my boyfriend and I hit the trail, but as the days start to get hotter (and if you go midday) the smell may get stronger. It’s a small site, so you’ll move past it quickly and easily get upwind of the odor.

About a mile up the trail, you’ll come up on a creek. In 2016, a wildfire tore through the WMA, burning nearly 5,000 acres and leaving skeletons of trees that form an eerily beautiful archway that frames the stream as you follow it back into the hills.

Here is where you start into more difficult terrain. The pathway narrows to a single track littered with loose rocks. Be sure to wear shoes with good tread — you’ll encounter even more gravel near the mine.

The next mile of the trail features a background of beautiful wildflowers as you climb a fairly punishing uphill stretch. You’ll gain about 1,300 feet in elevation from the trailhead to the mine itself, and the bulk of that rise occurs over the second mile. The lupine, phlox and arrowleaf balsamroot are a welcome distraction from the wave of hills you’ll have to summit.

“Once you hit those higher elevations, you’ll start to see native plants and shrubs,” Biorn said. “It’s a pretty spectacular spot for native vegetation.”

With about half a mile left, you’ll crest a hill and get a first glimpse of the old mine outbuilding. From here, the trail starts to even out in elevation, but watch your step — there’s a steep cliff to the right and loose rocks on the trail, which becomes a bit more narrow.

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The old mineshaft is blocked with rocks and debris. The Adelmann Mine trail takes you right up to the mineshaft and an outbuilding. Nicole Blanchard nblanchard@idahostatesman.com

As you approach the outbuilding, the old mineshaft will be on your left. Rocks have caved in and blocked off the shaft, but the metal rails that once connected the mine and outbuilding remain embedded in the trail. Up ahead you pass a corrugated metal warehouse, cross a small stream and arrive on the gravelly strip of trail that meets the top of the outbuilding. A wood plank leads into the top of the building, though the wood is clearly very old, so I wouldn’t walk on it. (Neither the outbuilding nor the mineshaft are in use anymore, and the BLM warns that they pose a potential safety hazard. The agency urges hikers to stay out of the building and away from the mine shaft.)

Seeing the old mine is certainly a big draw for this trail, but the nature views from the top are just as breathtaking. From 5,000 feet up, you get an unobscured view of the rolling Boise Mountains and the snowcapped peaks beyond.

If you’re looking for some solitude near the city, this trail is a great option. We saw only one other person on the trail on a weekday afternoon.

Plan to take about 3 hours round trip from the trailhead — that’ll give you plenty of time to take in the sights at the top of the hill. Biorn said access is limited from October to the beginning of May to protect wildlife wintering there, so plan to make this a spring or summer trip.

History

The history of the Adelmann mine is murky.

“Unfortunately, mining records are not very consistent,” said Angie Davis, a library assistant with the Idaho State Historical Society.

Davis was able to trace mines in the Lucky Peak area to the Adelmann family, for whom a Downtown Boise building is still named. Richard C. Adelmann was a saloon keeper, architect and miner, according to historian Arthur Hart. He owned the “Adelmann group” of mines in the Black Hornet District.

It’s not clear exactly when the structure now referred to as Adelmann Mine was built. Old geology and mineral records show mining activity in the area dating back to 1903. Similar records list Adelmann Mine as a gold mine that also yielded silver, lead, pyrite and quartz.

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With the old mineshaft behind you, you can see rails that would’ve connected the mineshaft to the still-standing outbuilding along the Adelmann Mine trail outside Boise. Nicole Blanchard nblanchard@idahostatesman.com

The Black Hornet mines were never as fruitful as those in other parts of the state.

“The mines were discovered and worked from underground in the late 1800s and early 1900s with intermittent development work and very little production since then to about World War II,” said Virginia S. Gillerman, a research geologist with the Idaho Geological Survey. “Production overall was modest to low.”

Today, wildlife biologist Biorn said, private owners still have a claim on the area and mine it by hand for gold.

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The trail to Adelmann Mine takes you right up to the top floor of the outbuilding. Don’t try to cross the wood walkway, though -- the boards are old and potentially dangerous. Nicole Blanchard nblanchard@idahostatesman.com


Getting there

From Interstate 84, take Exit 57 toward Idaho City on Idaho 21. Head north on Idaho 21 for 10.3 miles. Hilltop Station on your left serves as a half-mile warning. Turn left toward the Boise River Wildlife Management Area offices. There are about four parking spaces outside the gate.

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