CALEDONIA, Minn. — Mud slides, washed-out trails and slipperiness have forced the weekend closure of outdoor venues across flood-stricken southern Minnesota. Among closures ordered by the state Natural Resources Department:
> Beaver Creek Valley State Park near Caledonia.
> Mystery Cave State Park and Forestville near Preston.
> Root River State Trail and the Chatfield Trail, Snake Creek Trail and the Southeast Minnesota Trail in Richard J. Dorer Memorial Hardwood State Forest.
Many campgrounds also are closed.