The Ironman triathlon will pass through the Spring area this weekend, and other community events in the area include the Relay for Life walk and an animal rescue group fundraiser. Saturday  Memorial Hermann Texas Ironman The annual triathlon begins with a 2.4-mile swim in Lake Woodlands beginning at Northshore Park, followed by a 112-mile bike race and a 26.2-mile run taking place throughout The Woodlands and its surrounding areas. 5 a.m.-11 p.m. $710-$795. Waterway Square parking lot, 1505 Lake Robbins Drive, The Woodlands. www.ironman.com   Relay For Life ‘Cruise for a Cure’ Relay For Life is a nonathletic community event to raise funds for the mission of the American Cancer Society, which seeks to save lives, celebrate lives and lead the fight for a world without cancer. The event is family-friendly. No pets are allowed. Noon-midnight. Free. Klein Oak High School, 22603 Northcrest Drive, Spring. www.relayforlife.org/northwesttx   Cirque-tacular Seen in over 70 countries, the show features acrobats who balance, toss, catch, twist and intertwine in an elegant ballet of strength and stamina. Audiences are stunned as they do multiple aerial acts and body balancing. 3 p.m. $6 (students and children), $10 (seniors), $12 (adults). Cypress Creek Foundation for the Arts and Community Enrichment, 6823 Cypresswood Drive, Spring. 281-440-4850. www.cypresscreekface.org   Grand opening Our House Throwback Candy Shack holds a grand opening this weekend with live music on Saturday and karaoke on Sunday. The Old Town Spring shop sells nostalgic candy and sodas as well as collectibles for popular movie, TV and music franchises. Noon-midnight (Sat.), 1-10 p.m. (Sun.). Free. 419 Gentry St., Ste. 105-106, Spring. 832-447-4788. www.facebook.com/ourhousetcs Sunday Paws for a Cause Postponed from an earlier date, this annual pet adoption and rescue awareness event is sponsored by Better Homes & Gardens Real Estate Gary Greene. Proceeds collected from sponsors and contributors will be donated directly to area rescue groups in Klein, Tomball and Spring. Attractions include food trucks, music, face painting, a silent auction and shopping. Pet-related activities include adoptions, low-cost vaccinations, expert pet advice and pet chipping. 1-4 p.m. Free. Better Homes & Gardens Real Estate Gary Greene parking lot, 8817 Louetta Road, Spring. 832-474-0770.