After conducting research, it appears that the boat ramp named County Road 250 in Live Oak, Florida is primarily known as the Suwannee River boat ramp. This boat ramp is located on the Suwannee River and is managed by the Florida Fish and Wildlife Conservation Commission.

According to the Florida Fish and Wildlife Conservation Commission website, the Suwannee River boat ramp is a concrete boat ramp that is 12 feet wide. It is suitable for launching small to medium-sized boats. The website also states that the boat ramp provides access to the Suwannee River, which is a popular location for fishing and boating activities.

In terms of permitted watercraft, the Florida Fish and Wildlife Conservation Commission website states that the Suwannee River boat ramp permits fishing boats, canoes, kayaks, and other small watercraft. However, it is important to note that each body of water may have its own specific regulations, so it is always important to check the latest information before heading out on the water.

Overall, the Suwannee River boat ramp at County Road 250 in Live Oak, Florida appears to be a suitable option for those looking to launch small to medium-sized boats and enjoy recreational activities on the Suwannee River.