After conducting research, I was unable to find any specific information about a boat ramp named County Road 34 in Moffat County, Colorado. However, there is a boat ramp located in the same general area known as the Browns Park National Wildlife Refuge Boat Ramp. This boat ramp is located at latitude: 40.6944, longitude: -108.9097.

The Browns Park National Wildlife Refuge Boat Ramp is a concrete boat ramp that is 20 feet wide with a gravel parking area adjacent to it. This boat ramp services the Green River, which runs through the Browns Park National Wildlife Refuge. According to the refuge's website, the following watercraft are permitted on the Green River:

- Non-motorized boats, such as canoes, kayaks, and rafts
- Motorized boats with a maximum horsepower rating of 10 HP or less
- Electric trolling motors
- Airboats (with special permits)

It is important to note that regulations and restrictions are subject to change, so it is best to check with the managing agency for the most up-to-date information.