The City of Lone Tree has enacted Stage 2 Fire Restrictions, effective July 2, 2026 until further notice.
The City of Lone Tree has enacted Stage 2 Fire Restrictions, effective July 2, 2026 until further notice.
Lone Tree is home to many exceptional outdoor spaces and recreational amenities. We want to make sure our residents get the opportunity to experience all that Lone Tree has to offer, and work with our partners to provide multiple ways to get outdoors, compete, learn a new skill, and more!
Each year the City of Lone Tree and South Suburban Parks and Recreation District offer Lone Tree residents five free swim days throughout the summer at Cook Creek Pool. Residents are entitled to free entry all day on the scheduled Lone Tree Free Pool Days. Proof of residency is required.
Saturday, July 18, 2026
Event Sold Out
Free Day Update as of 7/17/26 at 2:50pm
Parker Water & Sanitation District has confirmed that recent water quality testing found no harmful algal bloom at Rueter-Hess Reservoir.
The reservoir is open and operating as normal, including access for paddleboards, kayaks and other watercraft, and fishing.
Lone Tree’s Free Day at Rueter-Hess Reservoir will proceed as planned, and all reservations will be honored.
Residents who would still prefer to visit on another day may pick up a free general admission pass at the City of Lone Tree Municipal Building, 9220 Kimmer Drive, during regular business hours. Passes are valid for any day the reservoir is open.
August 7-9, 2026
Grab your doubles partner and try for the Lone Tree Cup at the Lone Tree Tennis Center! Learn more about tennis through South Suburban.
Sunday, August 16, 2026
Get your team together to enjoy a beautiful day on the Lone Tree Golf Club greens!
Sign up as a single, double, or bring a whole team. Registration is open to Lone Tree residents through July 20, open to the general public starting July 21. See all the details and register on South Suburban’s website.
Sunday, August 30, 2026
Take in the beautiful mountain views while challenging yourself! In partnership with SSPRD, we bring you a race that will test your abilities but is fun for all ages! Reward yourself with some awesome post-event snacks and beer garden at the end of the race.
More information and registration coming soon! Visit the South Suburban Race Series page for more.
June 13, 1 p.m. – 3 p.m.
Bring the whole family and learn the basic fundamentals of the golf swing. The Golf Professionals will teach the grip, stance, and full swing from beginning to end.
They’ll also share their favorite tips to help you get your game off the ground or simply tune up for the season.
All abilities welcome. Minimum age 10.
Attendance is free, but pre-registration is required.
Registration is full. To be added to the waitlist, contact bailey.dunning@cityoflonetree.com.
July 11, 1 p.m. – 3 p.m.
The fastest way to lower your score is to know how to get the ball in the hole. The Golf Pros will teach you and your family the fundamentals of putting. From the grip, the stance and stroke, to the reading of the green and strategy, this putting clinic will be sure to help you drop shots this year and for years to come.
All abilities welcome. Minimum age 10.
Attendance is free, but pre-registration is required.
Registration is full. To be added to the waitlist, contact bailey.dunning@cityoflonetree.com.
August 15, 1 p.m. – 3 p.m.
This clinic is open to adults looking to improve their short game. You will learn the basics of chipping, pitching, and bunker shots. The Pros will share with you what helps the best players in the world succeed around the greens. Following the clinic, you’ll have the opportunity to relax on the patio with a complimentary glass of wine and share your recent chipping successes with your new golf friends.
All abilities welcome. Adults only. Attendance is free, but pre-registration is required.
Must be 21 and have an ID present to receive your complimentary glass of wine.
Registration is full. To be added to the waitlist, contact bailey.dunning@cityoflonetree.com.