According to the latest information available, the Granite Peak Road boat ramp is located in Trinity Center, California. It is a gravel boat ramp that is approximately 12 feet wide. The ramp provides access to Trinity Lake, which is a large man-made reservoir on the Trinity River.

Trinity Lake is popular for a variety of water-based recreational activities, including boating, fishing, water skiing, and swimming. The lake covers over 17,000 acres and has a maximum depth of 240 feet. The lake is home to various species of fish, including rainbow and brown trout, largemouth and smallmouth bass, and catfish.

As for the craft permitted on the water, all types of boats are allowed on Trinity Lake, including powerboats, kayaks, canoes, and paddleboards. However, boaters must adhere to all safety regulations and have the proper permits and equipment on board.

Overall, the Granite Peak Road boat ramp is a convenient and accessible launch point for boaters looking to enjoy Trinity Lake's scenic beauty and recreational opportunities.