After conducting research, it appears that there is no boat ramp specifically named C-470 Trail Lakewood in Colorado. However, there are several boat ramps in the Lakewood area, including the Bear Creek Lake Park boat ramp and the Chatfield Reservoir boat ramp.

The Bear Creek Lake Park boat ramp is located at 15600 W. Morrison Road in Lakewood and services Bear Creek Lake. According to the park website, the boat ramp is a "two-lane concrete ramp with a courtesy dock" and is open year-round. It also states that the lake allows motorized and non-motorized boating, including fishing boats, sailboats, and paddlecraft.

The Chatfield Reservoir boat ramp is located at 11500 N. Roxborough Park Road in Littleton and services Chatfield Reservoir. According to the Colorado Parks and Wildlife website, the boat ramp is a "four-lane concrete ramp with a courtesy dock" and is open from March to November. The reservoir allows motorized and non-motorized boating, including fishing boats, sailboats, and personal watercraft.

Based on this information, it appears that the C-470 Trail Lakewood boat ramp is not a specific location in Colorado and that boaters can use either the Bear Creek Lake Park or Chatfield Reservoir boat ramps in the Lakewood area. Both ramps are wide concrete ramps with courtesy docks and allow a variety of watercraft, including motorized and non-motorized boats.