New Hampshire is a world-class ice and mixed climbing destination with classic test-pieces and friendly beginner routes. The winters are long, wet and cold which means that there are a lot of frozen flows to choose from.
The Frankenstein Cliff is a popular place near North Conway thanks to the number of single-pitch lines. Cannon Cliff is where the alpine-style winter routes are found. Cathedral Ledge has technical multi-pitch lines in a stunning setting. Rumney has fun short climbs that you can link for a big day out. And finally Mount Washington has committing ice routes in a big mountain environment.
A few of the must-climb routes are Repentance WI5 M4 3p at Cathedral Ledge, Pinnacle Gully WI 3p in Huntington Ravine, Black Dike 5.6 WI4/5 M3 3p at Cannon Cliffs (above photo), and Dracula WI4+ at Frankenstein Cliffs. Veteran New Hampshire ice climber Matty Bowman shared a collection of clips from the area in the video below. There are several ice and mixed guidebooks to the area, including New Hampshire Ice: A Select Guide, which you can find here.