Choctaw Country Events Cultural Educational Family Historical Summer Solstice Walks Celebrate the official first day of summer with a guided summer walk around through indigenous prehistory. Constructed by Natives more than 1,000 years ago, the mounds offer a unique glimpse into ancient Oklahoma while the tour guide brings the stories surrounding their past to life. The tours run at 11am, 2pm and 7pm, and each one covers about a mile over the course of two hours. Add to Calendar