Lawton Fort Sill Chamber of Commerce Calendar of Events CartEvent ListingCalendar ViewTuesday, July 25, 2017Grand National Horsemen's AssociationWhen:from Tuesday, July 25, 2017 8:00 AMthru Saturday, July 29, 2017 8:00 AMWhere:Great Plains Coliseum Add to calendar Apple Google Microsoft 365 Outlook (desktop)Calendar ViewBusiness Directory | Chamber Events | Member Account | Community Events | Jobs | Member Promotions | Member News | Request Info