Union Reservoir Beach Closed for 2026

Due to anticipated low water levels throughout 2026, the Union Reservoir Swim Beach will be closed for the summer season. These conditions do not allow for the water depth needed to safely support traditional swim beach operations. We appreciate the community’s understanding as we adapt to these environmental factors.

 

While the swim beach will be unavailable, visitors can still enjoy a variety of recreational opportunities at Union Reservoir:

• A designated wading area, up to three feet deep, will be available May 23-Sept 19. Please note this area has a natural clay and rocky surface. Use is at your own risk, and children must be supervised by an adult at all times.
• The Dog Swim Beach will remain open for canine visitors.
• Paddleboarding, kayaking and boating remain available, with water levels sufficient for launching and access from multiple points.
• Additional sand has been added to the beach area which is great for sand play such as building castles and creating winding waterways.
• Group and individual picnic sites with tables and grills are located throughout the park and are available on a first-come, first-served basis. (Grills are not allowed on the swim beach.)

 

Visit the Union Reservoir webpage or call the Ranger Line at 303-772-1265, ext. 5 for more information.

 

Sunset Pool opening just in time for Memorial Day weekend

Sunset Pool at 1900 Longs Peak Ave will open on Thursday, May 21 with pre-summer hours. Sunset Pool is designed for the entire family with six lap lanes, a large wading area, three diving boards, two waterslides, an indoor party room, reservable outdoor shade shelters, a sandy beach play area, family locker rooms and great views. Find details about all City of Longmont pools at longmontcolorado.gov/pools or call 303-774-4700.

 

Pre Summer Hours for Open Swimming

Thursday, May 21 and Friday, May 22, 12:30 pm – 5 pm

Saturday, May 23, 10 am – 5 pm

Sunday, May 24, 12 pm – 5 pm

Memorial Day, Monday, May 25, 10 am – 5 pm

Tuesday –  Friday, May 26 – 29, 12:30 – 5 pm

Saturday, May 30 10 am – 5 pm

Sunday, May 31, 12 – 5 pm

 

There are different hours for lap and adult swimming (18 years and older) and scheduled water fitness classes. Visit longmontcolorado.gov/pools for details and future summer season schedules.

 

Registration Open for Summer Swim Lessons

Registration for summer swim lessons at Centennial Pool, Longmont Recreation Center, and Sunset Pool are now open. There are classes available for every age and skill level, from first-time floaters to swimmers looking to build their confidence in the water. Indoor lessons at the Centennial Pool and Longmont Recreation Center begin the Tuesday after Memorial Day, May 26, and outdoor lessons at Sunset Pool begin June 1.

 

Spots are still available, but favorite class times fill fast as Memorial Day weekend approaches. Families are encouraged to register early to secure their preferred lesson times. If a class is full, individuals can join the waitlist or sign up for classes during the later summer session.

 

Upcoming Lifeguard and Swim Instructor Trainings

Interested in working as a lifeguard or swim instructor this summer? Lifeguard Certification Trainings are scheduled for June 8 – 11, June 22 – 25 and July 13 – 16. Swim Instructor trainings are scheduled for May 26 – 29 and July 28 – 29. Find out more and register for these upcoming classes at longmontcolorado.gov/pooljobs.