Celebrate fall this October by visiting the turning leaves at the Denver Botanic Gardens, which is holding a free day for Colorado residents on Oct. 2. Other October events include the Great American Beer Fest on Oct. 11 to 13, held every year at the Colorado Convention Center. The end of the month includes Halloween, an event celebrated with Mile High style in the Mile High City. What are you looking forward to most about October this year? Share your comments below.