The best hills are in Arcadia East of I 35 and North  and South of  Route 66.  In addition there are some short hills in the Nichols Hills area.  The hill in Arcadia are harder to find and are a longer drive from OKC.  Nichols Hills, it is a city within OKC, is northwest of N. Western and 63rd Street.

Email if you would like help in finding these areas.