I grew up in Manchester but haven’t lived there in about 15 years. Webster Elementary has great stuff and is where I skated damn near every day for a decade, my old high school Central has spots, buncha stuff downtown on Elm St (skate the 9 stair across from the YMCA!) and buncha stuff on the west side.
Pretty much any urban or college area is gonna have something, so Concord, Portsmouth, Keene, Plymouth, etc.