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Based on the latest information available, the Granite Lake boat launch is a concrete boat ramp located in the town of Nelson, New Hampshire. It is approximately 20 feet wide, which can accommodate small to medium-sized boats.

The boat ramp services Granite Lake, a 233-acre lake that is ideal for fishing and boating activities. Granite Lake is mostly surrounded by forest, making it a peaceful and serene location for outdoor lovers.

All types of watercraft are permitted on Granite Lake, including canoes, kayaks, sailboats, and motorboats. However, boaters are reminded to follow safety regulations and respect the environment to preserve the lake's natural beauty.

In summary, the Granite Lake boat launch is a concrete boat ramp located in Nelson, New Hampshire. It is 20 feet wide and services the 233-acre Granite Lake. All types of watercraft are permitted on the lake, but boaters should follow safety regulations and respect the environment.