This trail is found at the Castle Mounds Campground within the Black River State Forest.  Black River State Forest is huge so follow these instructions to get to the correct campgrounds:

From I-94, take Black River Falls Exit 116, travel west on Hwy 54 into Black River Falls. Drive to the third set of traffic lights. Turn left (south) onto Hwy 12/27. Then turn left (east) onto Hwy 12. The campground is located approximately one mile east on Hwy 12. 

Once you arrive, the trail can be accessed from two points:

1. The parking lot behind the welcome center (if you are not camping here)

2. The trailhead between sites 13/35 (if you are camping here)

These two access points will meet up along the trail.  Once the trails meet up, watch out for the signs to the lookout.  There is opportunity to explore off the trail and places to climb if desired.  This trail is filled with a lot of fun and unexpected beauty.