Miles City Festival this weekend Posted on September 14, 2010 by Phyllis Erck Miles City: Music on Wings Bluegrass Festival September 19, 2010 9:45 am – 5:00 pm Eastern Montana Fairgrounds. Gospel music, 9:45 a.m. Concerts until 5 p.m. Raffle drawing, 4:45 p.m. Contact Info 406-234-2480. Location:Â Map Weather