RELATED | Downtown Tulsa Osage Casino announces details ahead of August opening The casino is about 4 minutes north of downtown, but Bighorse says they are calling it a downtown casino because of the close vicinity. We really feel like we are a part of that, said Byron Bighorse, Chief Executive Officer of the Osage Casino. “We are the closest casino to downtown and you see the expansion of all the construction of all of everything that has happened downtown. (KTUL) - The Osage Casino is unveiling a new casino, complete with a new hotel, swimming pool and microbrewery.
