NOTE: There is a north turn and a south turn for K 18. The south side returns you to Sioux City (do not pass Go, do not collect $200); the north turn takes you to where you want to go: Five Ridge.
The entrance to the Five Ridge Prairie Preserve is about a mile north of K 18 via 260th ST, a dirt road. WARNING: This road is impassable when wet!
Five Ridge Prairie is 790 acres of largely undeveloped Loess Hills prairie (on the ridges) and woodlands (in the ravines) managed by the Plymouth County Conservation Board. Only the southern most area of Five Ridge, with the entrance and parking area, is shown on the above map. The preserve continues to the north. This is one of the largest remaining roadless areas in the Loess Hills.
