The steepest hill out of “Historic Downtown Lehigh” is School Hill Street but it is not a part of the route. Last time RAGBRAI went through Lehigh the local committee sponsored a contest with the prizes being t-shirts for those who could bike up the hill. Seems like you paid three or four bucks for a chance to try the hill and if you made it to the top without your feet touching the ground you got a t-shirt. I stuck around long enough to see three or four guys fail and one nearly make it and fall.
RIDE RIGHT