Garrison Bridge, Road bridge in Powell County, Montana, United States

Garrison Bridge is a road bridge in Powell County that carries traffic across a waterway or valley below. The structure consists of steel and concrete elements that support daily vehicle passage through the region.

The bridge was constructed to improve transportation links across Powell County and connect local communities. Since its completion, it has served as essential infrastructure supporting the region's growth.

Garrison Bridge carries the road over the Clark Fork River in a rural stretch of Powell County, Montana, near the community of Garrison. The name comes from the nearby settlement, and the crossing is used by local drivers and anglers heading to the river. It is a working country bridge rather than a gathering place.

The bridge is accessible year-round for vehicle traffic with regular maintenance performed to ensure safe crossing conditions. Visitors can pass through anytime using the main road network.

Garrison Bridge carries the old Mullan Road alignment over the Clark Fork near Garrison, Montana, a crossing tied to the 1859–1860 military road built under Captain John Mullan. The route linked Fort Walla Walla to Fort Benton and later served miners and settlers heading through Powell County.