What to do when there’s ‘nothing’ to do…

Calarat Challenge Trail Running Festival. 8 a.m. Sunday, Aug. 28, Cal-Wood Education Center, 2282 County Road 87, Jamestown

The Calarat Challenge Trail Running Festival will host multiple long-distance races on the private properties of Cal-Wood and Balarat Outdoor Education Center. Join Cal-Wood the night before the race for dinner and the chance to hear motivational guest speakers. After the race, celebrate your accomplishment with beer, food and live music. 

Louisville Trail Half Marathon 10K and 5K. 7 a.m. Saturday, Aug. 27, 955 Bella Vista Drive, Louisville

Runners are lacing up their sneakers for the ninth annual Louisville Trail Half Marathon, 10K and 5K on Aug. 27. The race will take runners on a tour of the trails in the area that overlook the Rockies and Flatirons. Not running? Friends and family are welcome to enjoy the post-race festivities. 

Clay Bonnyman Evans—’Adrift on the Pacific Crest Trail.’ 6:30 p.m. Tuesday, Aug. 30, Boulder Bookstore, 1107 Pearl St., Boulder. Tickets: $5, boulderbookstore.net

Local author Clay Bonnyman Evans will speak about and sign his book  Adrift on the Pacific Crest Trail: A Through Hiking Story, about Evans’ experiences and his emotional journey hiking the Pacific Crest Trail five years after completing the Appalachian Trail. 

The 2022 Great Boulder Duck Race. 3 p.m. Sunday, Aug. 28, Scott Carpenter Pool, 1505 30th St., Boulder

Adopt a duck and get ready for some quacktastic duck races and lots of family-friendly activities. Founded in 1988, The Great Boulder Duck Race raises funds to support the creation of equitable access to recreation for low-income families and people with disabilities in the Boulder community.

Japanese Cultural Day. Noon—5 p.m. Sunday, Aug. 28, Museum of Boulder, 2205 Broadway, Boulder. Tickets: $10.

Join members of the community when the Museum of Boulder hosts Japanese Cultural Day. Performances include Denver Buddhist Temple Minho Kai and the all-female Japanese Taiko drum ensemble Mirai Daiko. Learn more about Japanese culture by speaking with members of Chibi no Gakko, a K-12 educational Japanese program. 

Planet-Based Living Festival. 11 a.m.-5 p.m. Sunday, Aug. 28, Central Park Bandshell, 1212 Canyon Blvd. Boulder

The Planet-Based Living Festival highlights and celebrates every day choices that are kinder to the planet. Enjoy a late summer day in the park while supporting local vendors and learning various ways to reduce waste, use fewer resources and have a generally positive impact on the environment.