Furnace Run Rock Creek is really only shown as Rock Creek Run. Per the Metroparks, Furnace Run is also Old Mill Trail, which was nice because you can get more miles in.
There isn't much elevation change and there are two loops that make a figure-8, which together ended up being a bit over 2.5 miles. It was a little slick today due to the warm-up and melting ice, so have good boots or poles for safety if you come soon.
E J. on Old Mill Trail
Scenic mile-long forest trail that crosses over a creek several times. A few changes in elevation make for some hills. Brush family marker is visible on the trail. Very nice walk.
E J. on Furnace Run Rock Creek Loop
Beautiful wooded trail with scenic views of the creek. Very easy 1.2-mile walk.