Niwot Jazz Festival: 3 p.m., Cottonwood Square Shopping Center, 7960 Niwot Road, Niwot. Now in its fourth year, the Niwot Jazz Festival continues the tradition of bringing high quality jazz music to Niwot, attracting 800-1,000 visitors each year. The musical line up this year includes After Midnight, Angela Bingham, Brian Lynch with the Keith Waters Trio and saxophonist Peter Sommer and a salsa dance party with Quemando. Free, 720-492-3124.

Summer Vibes Bike Rally and Run Festival: 9 a.m., Bohn Park, 199 Second Ave., Lyons. After a five-year hiatus, the festival is back with rock bands, cold beers, BMX dirt jump jam, the Beer Relay and camping. New to the event are two gravel bike races, a five-mile Trail Dog run, saunas and two lounge pools to cool down in while watching the bands or after a bike/run adventure. Free-$170, summervibesrally.com.

Red Frog Market: 10 a.m., Red Frog Coffee, 15 Ken Pratt Blvd., Suite 200, Longmont. Hop on over to shop at the Red Frog Market featuring unique and fanciful fine arts and crafts by local artisans. Listen to live music by local musicians, while sipping coffee shop drinks on the third Saturday of each month. Free, 303-772-7209, redfrogmarket.com.

Bootstrap Brewing’s 13th anniversary bash: noon, Bootstrap Brewing Company, 142 Pratt St., Longmont. Join for a full day of amazing live music to celebrate 13 years. There will be artists onsite selling wares, special beer releases, photo booth, free face painting and henna artists, food and more. Live music performances from Cat Jerky, Unauthorized Absence and The Long Run Tribute to the Eagles. facebook.com.

Longmont Juneteenth: 3 p.m., Roosevelt Park, 700 Longs Peak Ave., Longmont. The Longmont Chamber of Commerce is proud to join the celebration at this year’s Longmont Juneteenth Festival. Stop by the tent to connect and pick up a limited-edition Longmonster Juneteenth 2025 sticker, available only at this event. Come enjoy an afternoon of live music, cultural performances, local vendors and powerful community storytelling. This family-friendly festival honors freedom, resilience and the vibrant legacy of Black culture in Longmont. Free, business.longmontchamber.org.

Barnyard Critter Day: 9:30 a.m. Sunday, Agricultural Heritage Center, 8348 Ute Highway 66, Longmont. Join for a family-friendly day of farm fun. Meet chickens, goats, pigs, cows and horses. Enjoy demos of sheep herding, shearing and wool spinning. Try hands-on activities like butter making, corn cob dolls and calf roping. 4-H groups and a ranger horse will be there, too. Free, boco.org.

Family LEGO Club: 2 p.m. Sunday, Erie Community Library, 400 Powers St., Erie. Join to dream it, build it and make friends. Families are invited to hang out and build with provided LEGO bricks. Bring the fun and creativity. Free, highplains.libcal.com.

Bootstrap LOCO Ukulele Jam: 2 p.m. Sunday, Bootstrap Brewing Company, 142 Pratt St., Longmont. Grab a ukulele, and join in the fun. Host Brian Rezac has extras to borrow, or bring one from home. Or, just come enjoy a beer and watch. All ages and levels welcome. bootstrapbrewing.com.

Summer Concert Band in the Park: 4 p.m. Sunday, Roosevelt Park, 700 Longs Peak Ave., Longmont. Join the Longmont Concert Band in beautiful Roosevelt Park for the band’s first outdoor concert of the summer. Fresh from a performance at Carnegie Hall, the band will share summertime favorites, from Gershwin to patriotic classics and movie theme compositions. Bring a chair or blanket and join the band at the pavilion. Free.

Art with Books and Artists: 1 p.m. Monday, Firehouse Art Center, 667 Fourth Ave., Longmont. Join Sara Broers Brown for an afternoon of making art inspired by book illustrators including Eric Carle and Dr. Seuss and famous artists such as Claude Monet and Paul Klee. During the week, explore creativity with paint, pastels, scissors and glue. Younger inspiring artists will have help with any skills they have yet mastered. Brown is a Colorado K-12 licensed art educator with over 25 years of experience and is sure to fill the week with exploration and colorful art that might earn a frame. Be prepared to have a little bit of the sillies and movement. It’s recommended to bring an apron or oversized shirt that can get messy. $250, 303-651-2787, firehouseart.org.

Erie Teen Advisory Board meeting: 6:30 p.m. Monday, Erie Community Library, 400 Powers St., Erie. Bring ideas for tween and teen library programs and services. Registration required. For ages 12-18. Free, highplains.libcal.com.

Line dancing: 6:30 p.m. Monday, St. Vrain Cidery, 350 Terry St., Suite 130, Longmont. Head to the Cidery every other Monday for a fun-filled dance class with Amanda. Move, groove and vibe to a variety of music while getting some steps in. Tickets include a coupon for a free 4 ounce pour. $12, 720-727-5706, stvraincidery.com.

Editor’s note: Availability and scheduling of events may be subject to change.