Montana Highway 21 (Simms to augusta) Closure Information

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This spring, portions of Montana Highway 21 (the road that connects Augusta to Simms) will be closed, specifically from mile markers 0 to 1 as the Montana Department of Transportation works to replace structures at Elk Creek, Elk Creek Overflow and Hogan Slough. And while we realize that road closures are not ideal, the good news is that it will still be easier than you think to get to Augusta. As you can imagine, Highway 21 is a heavily utilized road in the spring and early summer, especially as we have amazing folks from the Sun River Valley, Great Falls and beyond come to visit us. We don't want that to stop (tourism and out-of-town visitors have a big impact on our community).

With that in mind, here's what you need to know about the temporary closures on Highway 21 (for additional context, these closures are on the far end of the Augusta side of 21). The bottom line: it's STILL easy to get to Augusta. While there are official detours provided by MDT, we have our own recommended detours to make it easy for you to get to us. Keep reading for official information below, as well as our recommended detour routes. From our community and its local businesses to you, we can't wait to see you. 

Here's our recommended detour routes: 

• Coming from Great Falls, at Sun River take Montana 89 north to Fairfield. From Fairfield, take Highway 408 to Augusta. This route is only approximately 5-7 minutes longer to get to Augusta than on Highway 21.
• From Simms, travel down Highway 21 and turn left onto the Bob Thomas Road (right after the Montana Department of Transportation equipment yard). This is an 8.5-mile-long gravel road that will take you around the construction area and to Augusta. Keep in mind this is a gravel road - drive slowly and be respectful of others.