Hellroaring Plateau is a high mountain plateau at an elevation of 3.020m (9,908ft) above the sea level, located in Carbon County, in the U.S. state of Montana. The road to the summit is rocky with potholes. High clearance vehicles are advised. It’s one of the highest mountain roads of Montana.
Tucked away in the Beartooth Mountain Range, the winding mountain road to the summit is totally unpaved. It’s called Hellroaring Road (aka Custer Gallatin National Forest Service Road 2412 and Forest Service Road 421). Road conditions are always changing. Winter comes early and stays late on this trail, so you may only be able to safely run it in the middle of the summer. Most of the road is single-lane only, with occasional places to pass oncoming vehicles you may encounter. The road is more than just rugged. It’s kinda scary. Basically you are driving on boulders and rocks the whole way up. If you don't have a truck or an SUV do not even try. Despite the narrow passages and thousand-foot drops, the road has no guardrails, so keep your eyes on the road and not the incredible views. There is ample parking at the summit.
The drive is very steep. Starting from US-212 (Beartooth Highway), the ascent is 10.62km (6.6 miles) long. Over this distance, the elevation gain is 848 meters. The average gradient is 7.98%. On this journey you will be able to use your camera to capture images of wildlife and breathtaking scenic views. The drive features amazing views from the switchbacks as well as across the plateau. The "road" is very rough, don't even try it without a full size truck or SUV. The road, located in the Custer Gallatin National Forest, was built in the 1930s to develop chrome deposits on Hellroaring Plateau.
A minor old road east of the parking travels across the plateau and ends at 3.311m (10,862ft) above the sea level.