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“The climb of Leviathan (Route 63) is a nice hill near the Massachusetts and Vermont borders of New Hampshire. Quite popular with area riders, it carries cyclists and a few vehicles north along a moderate grade and towards other riding. The grade goes up and down on this one but there are no real surprises. There is one final stretch of more solid slope before the listed climb ends at an unmarked top after 3.9 miles.” (This quote is presented with the approval of John Summerson, from his book, The Complete Guide to Climbing (by Bike) in the Northeast, pg. 109.)