1. Glenwood Springs Pool
Glenwood Springs, Colo.
Take a break from I-70 at this historic resort at the intersection of the Colorado and Roaring Fork rivers, once a place where Utes wintered. Today, it is home to the world's largest hot springs pool, complete with water slides, a kiddy pool, a spa and 107-room lodge. It's just steps from Glenwood's charming downtown; hotspringspool.com.
2. Hot Sulphur Springs Resort & Spa
Hot Sulphur Springs, Colo.
This quiet facility west of Grand Lake features a series of small, soothing pools, some blazing hot, and four for kids. A spa offers massages, herbal wraps and mud masks; hotsulphursprings.com.
3. Ouray Hot Springs
Nestled in a tight valley overshadowed by 13,000-foot peaks, this large sulfur-free mineral pool on Main Street has three slides and is open year round. Massages are offered; ourayhotsprings.com.
4. The Springs Resort & Spa
Pagosa Springs, Colo.
Home to the world's deepest geothermal hot spring, this resort offers a variety of pools with temperatures ranging from 66 to 110°F. A 79-room hotel is part of the complex; pagosahotsprings.com.
5. Strawberry Park Hot Springs
Steamboat Springs, Colo.
Head north of Steamboat Springs to find this series of beautiful pools surrounded by evergreens. Massages are available. At night, it's adults only at the hot springs; strawberryhotsprings.com.
6. Iron Mountain Hot Springs
Glenwood Springs, Colo.
Spend the day relaxing along the banks of the Colorado River, soaking in one of the 16 hot springs pools while taking in incredible views of towering Mt. Sopris. Kids can play in the freshwater family pool within view from the elevated hot springs whirlpool. www.ironmountainhotsprings.com.
7. Splashland Aquatic Center
Soak in this outdoor steamy pool fed by a local geothermal hot spring in the San Luis Valley. It's part of Alamosa's history. Splashland started in the mid 50's when a drilling company struck hot water instead of oil. The iconic welcome sign looks much the same as it did 60 years ago. The pool is located one mile north of town on Highway 17. Open Memorial Day to Labor Day. www.splashlandllc.com
8. Hot Springs Aquatic Center
Soak in 100% geothermal odorless hot springs open to the public. The Salida Hot Springs Pool is the largest indoor hot springs facility in the county with water gathered from underground springs eight miles up the road, high in the Rocky Mountains. Shy? Try one of their soaking tubs in a private room. salidarec.com/public-pool
9. Mount Princeton Hot Springs Resort
This Rocky Mountain resort has multiple soaking springs. Soak in the historic bath house, small creekside, rock-borders creekside springs, the pool at the spa and club, or the upper pools with a 400-foot water slide. www.mtprinceton.com