mostly gravel ride in Michaux State Forest. Quite hilly with 5500' of elevation gain over 52 miles. Get past the first 13 miles and then it gets easier.  Lunch/snack at mile 35 in Pine Grove Furnace, home of the famous 1/2 gallon ice cream challenge for AT thru hikers (free if you eat all the ice cream in 30 minutes I think). Park in the gravel parking lot on Pine Grove Furnace Rd (Rte 233) just north of Lincoln Hwy (Rte 30) near Caledonia State Park in Pa (Caledonia Furnace Monument & Thaddeus Stevens Trailhead). I did this route last year on a gravel bike and avg 10mph. I used 700x42 tires. Route is about 65% gravel and 35% paved, with a very short section of single/double track.