The first time I slipped into the Iron Mountain Hot Springs in Glenwood Springs on a cold November morning — 107°F water, 35°F air, Colorado River running a few feet away — I understood immediately why this state has been built around its geothermal water for over a century. Colorado sits on top of some of the most mineral-rich hot spring geology in North America, and the towns that grew up around those springs haven’t let people forget it.
The problem is everyone has figured this out. Glenwood Hot Springs Pool on a July Saturday is genuinely overwhelming. The trick is knowing which springs suit your style and when to show up — or how to find the ones that never appear on a top-ten list.
What Makes Colorado Hot Springs Different From Other States?
Colorado’s hot springs are fed by deeply circulating groundwater that gets heated by geothermal activity associated with the state’s volcanic and tectonic history — the same forces that built the San Juan and Sawatch ranges. Many of the springs carry significant mineral loads: sulfur, sodium bicarbonate, lithium, calcium, magnesium. These minerals are why “taking the waters” was a genuine medical recommendation in the 19th century, and why the springs still feel different from a heated pool.
The range is extraordinary: from the world’s largest hot springs pool (Glenwood) to backcountry pools accessible only by multi-mile hikes. Developed, rustic, resort-grade, free and dispersed — Colorado has all of it.
Where Are the Best Hot Springs?
Glenwood Hot Springs Pool — Glenwood Springs
The largest hot springs pool in the world: 405 feet long, two pools (the main at around 90°F and the therapy pool at 104°F), and a location in the center of Glenwood Springs between the Colorado River and the canyon walls. This is the big one — the one that’s been operating since 1888, the one Theodore Roosevelt visited.
It’s also the crowded one. Summer weekends push capacity. The experience is closer to a well-run public pool than to a meditative soak — there are diving boards, a waterslide, families, and lines for the therapy pool.
When to go: Weekday mornings outside July-August. Or, counterintuitively, winter — a cold evening soak when snow is falling and the canyon walls are white is one of the best experiences in Colorado. Fewer crowds, better atmosphere, same water.
The alternative at the same location: Iron Mountain Hot Springs is a newer facility a half-mile away, on the riverbank below Glenwood Springs. Sixteen smaller soaking pools at varying temperatures, better landscaping, and a fundamentally different vibe — adult-focused, quieter, no waterslides. If you’re choosing between them, Iron Mountain wins on atmosphere. Glenwood wins if you’re traveling with kids.
Ouray Hot Springs — Ouray
Ouray sits at 7,700 feet in a literal box canyon, and its hot springs pool occupies a prime position near the canyon mouth, with views of the surrounding 13,000-foot peaks from the water. The facility is municipally run — entry fees go into Ouray’s city budget — and it shows in the character: this is a local pool that welcomes tourists, not a resort product.
The main pool is 165 feet long, with water between 96°F and 106°F. There’s a children’s section and a covered therapy pool. It’s well-maintained, reasonably priced by Colorado standards, and the setting is legitimately spectacular.
When to go: Ouray in general rewards an off-season visit. Spring (April-May) and fall (September-October) hit the sweet spot — good weather, reduced crowds, and the canyon walls in transition between seasons. Summer evenings are the best hot springs timing anywhere in Colorado.
Worth knowing: Ouray is also known as the “Switzerland of America” and the ice climbing capital of the U.S. The Ouray Ice Park operates in the canyon below town in winter, and the same geothermal water that fills the hot springs pool is pumped over the canyon walls to create artificial ice formations. Soaking in 104°F water while watching ice climbers is a genuinely unique experience.
Strawberry Park Hot Springs — Steamboat Springs
About ten miles north of Steamboat Springs, Strawberry Park is the hot springs that serious hot springs people talk about. The pools are natural-looking — rock-lined, set in a narrow valley with Strawberry Creek running alongside — and the setting is genuinely beautiful in a way that the urban developed springs can’t replicate.
The springs operate as a commercial facility (fee admission, private pools available), but the aesthetic leans rustic. Evening hours are adults-only. There are camping cabins on site if you want to stay.
The catch: The last three miles of the approach road are unpaved and can be rough — high clearance recommended, especially after rain. This filters the crowd somewhat. It’s also closed to children after dark, which dramatically changes the vibe.
When to go: Winter is Strawberry Park’s peak season among enthusiasts — the contrast between the cold outdoor air and the warm water, with snow on the valley walls, is exceptional. Reserve well ahead for winter weekends.
Mount Princeton Hot Springs — Chaffee County
Mount Princeton sits in the Collegiate Peaks area between Buena Vista and Salida, in the Arkansas River Valley. The springs are fed by geothermal water from the flanks of Mount Princeton (14,197 feet), and the resort has developed a combination of natural creekside soaks and constructed pools.
The creek soaks are genuinely special: natural rock pools along Chalk Creek, varying in temperature, free-access from the resort. The ambient water from the creek mixes with the geothermal flow and creates a temperature gradient — move between pools to find your preference.
What makes it different: The Collegiate Peaks backdrop. From the creekside pools, you’re looking directly at Mount Princeton and the surrounding 14ers. This is one of the most photogenic hot springs settings in Colorado.
Location advantage: Buena Vista and Salida are underrated Colorado destinations in their own right — river towns with good food, whitewater access, and significantly less resort pricing than the I-70 corridor towns. Adding Mount Princeton to a Chaffee County trip makes a lot of sense.
Pagosa Springs — Southwest Colorado
Pagosa Springs has the world’s deepest known hot springs — The Mother Spring, 1,002 feet deep as measured. The town has built a hot springs district around the San Juan River: several competing facilities (The Springs Resort and Spa being the largest, Overlook Hot Springs a smaller competitor) with riverside pools.
Durango is about 60 miles west — if you’re doing the San Juan Skyway or spending time in Durango, Pagosa is a legitimate side trip or overnight addition.
The water here: Higher mineral content than most Colorado springs. The sulfur smell is noticeable — if you’re sensitive to it, this affects the experience. Most regulars stop noticing it within twenty minutes.
How to Visit Without the Weekend Crowds
Hot springs have become significantly more popular in Colorado in the past decade. Weekends at any developed spring from June through August are busy. A few strategies that actually work:
Go on Tuesday or Wednesday. Not Monday (people extend weekends) and not Thursday (people start weekends early). Mid-week Tuesday and Wednesday are consistently lower-crowd at every developed hot spring in Colorado.
Go early or late. The first hour after opening and the last two hours before closing are reliably lighter. Evening soaks after 7pm in summer are often the best time — cooler air makes the hot water more pleasant, and day-trippers have cleared out.
Go in shoulder season. May and October are underrated. Water temperature is the same. Scenery in May has late-season snow on the peaks; October has fall color. Crowds are a fraction of July-August.
Go in winter. The obvious cold-weather deterrent filters crowds dramatically. Winter hot springs visits in Colorado — especially at Strawberry Park or Iron Mountain Glenwood — are exceptional. Bring waterproof sandals and a changing robe.
Target less-known options. The springs above get heavy traffic. Colorado has dozens of lesser-known developed springs and several dispersed (free, primitive) soaks accessible by hiking. Research the Waunita Hot Springs area near Gunnison, or the various undeveloped thermal outflows in the San Luis Valley — these won’t be on the top-ten lists, but they won’t have parking lots full of Subarus either.
What to Bring
A few practical notes that apply at almost every Colorado hot spring:
- Bring more water than you think you need. Soaking in mineral water is dehydrating, and you’re already at altitude.
- Waterproof sandals for moving between pools — most facilities have gravel or rough paths.
- A quick-dry towel; some springs charge for towel rental.
- Cash or credit card — most springs charge by the hour or session; some have lockers that require a deposit.
- Sunscreen even if it’s overcast — UV at altitude is high, and you’re likely to stay longer than planned.
Is It Worth Building a Trip Around?
Yes — if you’re spending more than three or four days in Colorado and skipping hot springs, you’re missing something genuinely distinctive. The combination of mineral water, mountain scenery, and altitude is not replicable anywhere else in the lower 48.
The best hot springs trips I’ve had in Colorado were the accidental ones: an Ouray overnight that turned into two nights because the hot springs pool was too good to leave, a winter detour to Glenwood that became the highlight of a ski trip that I’d actually planned around skiing. Build in more time than you think you need, and go when the crowds have cleared.
Related: Front Range vs Western Slope: where to base your Colorado trip | Colorado wildflower season | Ouray guide | Glenwood Springs guide | Steamboat Springs guide | AI Trip Planner