Based on the available information, the Chalkrock WMA boat ramp is located in South Dakota and has a latitude of 42.79891586 and a longitude of -97.37444305. It is unclear what kind of boat ramp it is, whether it is a concrete ramp, gravel ramp or other type of ramp.

The width of the boat ramp is also unknown, as there is no information available about its dimensions or capacity.

This boat ramp services a body of water in South Dakota, however, the exact water body it services is not specified. It could be a lake, river, or other type of waterway.

The kind of craft that are permitted on the water also remains unclear, as there is not enough information available to make any definitive statements. It is possible that the Chalkrock WMA boat ramp permits all kinds of watercraft, including motorized boats, kayaks, canoes, and paddleboards, but this cannot be confirmed without further information.

In order to verify the accuracy of this information, it would be necessary to conduct further research, consult with local authorities or individuals familiar with the area, or visit the site in person.