Bowman’s Hill climbs a bit over 300 vertical feet from River Road, with an average gradient of over 25%. That’s pretty darn steep, and it’s one of only a handful of spots within half an hour of downtown Trenton where you can gain so much elevation. Most of this trail is on paved paths, but the climb up the hill is on a trail that’s no longer maintained, hard to find, and unmarked. But it’s short, sharp, and fun: definitely worth checking out by experienced hikers, given its proximity. (Driving time is only about 20 minutes from downtown; rated for experienced hikers only for elevation gain, steepness, and lack of blazing).