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Through Time and Stone: Exploring Geology at Hall Ranch

Hall Ranch 31635 CO Hwy 7, Lyons

Join volunteer naturalists on a moderate 2.5-mile hike to explore Hall Ranch's remarkable geology. During the hike, you'll observe different rock formations that took millions of years to form. Learn more about how the mountains and canyons in this area were created while taking in incredible views!Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}

AHC Open

Agricultural Heritage Center 8348 Ute Hwy, Longmont

The Agricultural Heritage Center is open 10 a.m. – 5 p.m. April 1 to Oct. 31 Friday:10 a.m. – 5 p.m. Saturday:10 a.m. – 5 p.m. Sunday:10 a.m. – 5 p.m. Holidays CLOSED Friday, June 19 (Juneteenth) CLOSED Friday, July 3 (Independence Day observed) OPEN Saturday, July 4 Nov. 1 to March 31 The first Saturday of the month 10 a.m. – 5 p.m.

Altona School Open House

Altona Schoolhouse

Drop by anytime between 11 a.m. and 2 p.m. to go inside the historic Altona Schoolhouse where students studied and played from 1880 to the World War II era. Volunteers will be on hand to share the school’s history and restoration with visitors. If time allows, you can take part in a game or spelling bee.

Boulder County Fair

Outdoor Arena 9595 Nelson Road, Longmont

Boulder County Fair Get ready for a week of pure excitement at the 157th Boulder County Fair where Fair entry and parking are FREE! Enjoy livestock shows, the carnival, over 20 live bands, and so much more, all without an admission fee! For even more thrills, grab tickets for our grandstand events: the Award-Winning CPRA Rodeo on August 6th. Feel the rumble at the Tractor Pull on August 7th. Brace yourself for the Demolition Derby on August 8th! And don't miss the thrilling Mexican Rodeo Fiesta on August 9th! The Boulder County Fair – an experience you won't want to miss. CARNIVAL HOURS: Wednesday: 5 – 11pm Thursday: Noon – 11pm Thursday is Kid’s Day - Discounted carnival wristbands until 4pm Friday: 2pm – 11pm Saturday: Noon – 11pm Sunday: 2pm – 10pm For more information and tickets, go to: http://bouldercountyfair.org