Home / Idaho / The Portneuf & Bear River Country / Black Canyon of the Bear River
🏜️Geological

Black Canyon of the Bear River

Part ofThe Portneuf & Bear River Country
On this driveU.S. 91 and Idaho 34: The Cache Valley Crossing

A basalt gorge cut by a river that, most of the year, now runs past it in a pipe.

Off the Beaten PathPhotographyVolcanicFree
⏱
Duration
Fifteen minutes at the bridge; longer to walk the rim or fish.
📅
Best Season
Late spring through fall; check PacifiCorp's release schedule if you want to see the river running.

The Story

A mile west of Grace the Bear River drops into a narrow gorge of black basalt, walls broken into columns and ledges, pools at the bottom. The river cut it. Lava flows had already turned the Bear south at Soda Point, away from the Snake and toward Lake Bonneville, and as that lake fell the river kept cutting down through the basalt of Gem Valley to meet it. An early photograph reproduced on the canyon's interpretive panel shows the water running within a few feet of the rim.

Very little of that water comes through now. Grace was settled in 1889, and it was 1899 before its farmers finished the Last Chance Canal and got the river onto the valley's dry benches. In 1906 the Telluride Power Company began a dam above town, and by 1908 a wooden flowline was carrying the river some five miles across the valley to a powerhouse below the canyon, feeding a grid that sent the power south to northern Utah. Utah Power and Light took the plant over in 1912 and expanded it, and PacifiCorp runs it today as part of its Bear River Project. Below the dam the canyon carries what the plant does not take, plus releases scheduled for kayakers and rafters on certain days of the year.

So the gorge reads like a diagram: lava, the lake that drained, and a century of engineering sitting on top. Anglers fish its pools, and the view from the bridge and the rim takes a few minutes.

From Grace, take Center Street west about a mile to the Bear River bridge. PacifiCorp posts the Black Canyon boating release schedule online.

Visitor Info

⏱
Time Needed
Fifteen minutes at the bridge; longer to walk the rim or fish.
📅
Best Season
Late spring through fall; check PacifiCorp's release schedule if you want to see the river running.
🛣️
Highway
ID-34

On the Map

Nearby

The closest stops worth working into your route

geological9.3 mi away
Soda Springs Geyser
Drillers looking for hot water for a swimming pool hit cold soda water under pressure. The town put the geyser on a timer.
natural14 mi away
Lava Hot Springs
The pools belong to the state because the springs left the Fort Hall Reservation and Congress handed them to Idaho in 1902.
historical29 mi away
National Oregon/California Trail Center
Emigrants came down off Big Hill and camped in the clover here. Brigham Young renamed the town; the trail center brings the camp back in costume.
historical31 mi away
Boa Ogoi (Bear River Massacre Site)
The Northwestern Band bought back the ground where its people were killed in 1863, and is turning farm fields back into the river bottom they knew.
natural33 mi away
Bear Lake National Wildlife Refuge
The Bear River crosses this marsh twice: once in a canal into Bear Lake, and once in another canal on its way back out.
cultural34 mi away
Preston and Napoleon Dynamite
A farm town in the north end of Cache Valley that a former student turned into a set in the summer of 2003, without changing much of anything.

Historical markers nearby

Roadside plaques and monuments within a short detour

Marker5.5 mi away
Bear River Lava
Marker5.5 mi away
John Bidwell
Marker8.3 mi away
Chesterfield
Marker8.5 mi away
Soda Springs
Marker8.5 mi away
Camp Connor
Marker9.2 mi away
Hudspeth's Cutoff