Oklahoma Administrative Code
Title 300 - Grand River Dam Authority
Chapter 35 - Lake Rules
Subchapter 5 - Boating Safety Rules
Section 300:35-5-8 - Skiing prohibited

(a) No skiing is allowed upstream of the Strang Bridge on Lake Hudson, upstream of Twin Bridges on Grand Lake, in Elm Creek east of Grove water intake tower, upstream of the Harbors View Marina (a/k/a the turn) on Duck Creek or upstream of the Lakemont Shores Ramp on Drowning Creek.

(b) Wake jumping is prohibited in Cowskin and Elk River and in any arm of Grand Lake that, in its name, ends in Creek, Cove or Hollow. Wake Jumping is defined as the act of repetitively crossing another vessel's wake in such a fashion that the crossing vessel's hull leaves the water.