Rocky Mountain Front Heritage Act of 2011- Establishes the Rocky Mountain Front Conservation Management Area in Montana.
Designates specified land within the Lewis and Clark National Forest in Montana as wilderness and as additions to existing components of the National Wilderness Preservation System (NWPS).
Directs the Secretary of Agriculture (USDA) to prepare a comprehensive management strategy for the prevention, control, and eradication of noxious weeds in the Rocky Mountain Ranger District of Lewis and Clark National Forest.
Authorizes such Secretary to conduct a study for improving nonmotorized recreation trail opportunities, including mountain bicycling, on land within the District that is not designated as wilderness.