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After conducting research, I could not find any credible information related to a boat ramp named Lake Warren boat launch in New Hampshire. There are several boat ramps and launches in the state, including Lake Winnipesaukee, Lake Sunapee, and Lake Pleasant, among others.

Therefore, without accurate information, it is not possible to discuss the boat ramp named Lake Warren boat launch in New Hampshire, the kind of boat ramp it is, how wide it is, what body of water it services, and the kinds of craft permitted on the water.