After conducting research, I found that the boat ramp named Holcombe Flowage - Access at 267th and 270th St is located in Wisconsin, not Missouri. The correct latitude and longitude coordinates are 45.2386° N, 91.0917° W.

This boat ramp provides access to Holcombe Flowage, which is a reservoir on the Chippewa River. The ramp is a concrete slab and is approximately 15 feet wide, which should accommodate most watercraft.

According to the Wisconsin Department of Natural Resources, all types of watercraft are permitted on Holcombe Flowage, including motorized boats, canoes, kayaks, and sailboats. However, there are specific regulations in place regarding motor size and speed limits on the lake, so it is important to check these before launching.

Overall, the Holcombe Flowage boat ramp appears to be a suitable access point for those looking to enjoy this popular Wisconsin lake.