Home / United States / Colorado / Conundrum Hot Springs

Wild spring

Conundrum Hot Springs

Free
8.5 mi hike

High-elevation backcountry pools in the Maroon Bells-Snowmass Wilderness, about 8.5 miles one way from the Conundrum Creek trailhead near Aspen. Camping anywhere in the zone requires an advance Recreation.gov permit and use of your reserved site, and dogs are not allowed. Bear canisters are mandatory overnight, and the Forest Service asks visitors to pack out human waste.

Visit official website ↗Directions ↗

✓ Verified November 2026

Photo: Pierce Martin, CC BY 2.0, via Wikimedia Commons

Price: Free
Nearest town: Aspen
Hike (one way): 8.5 mi

Plan your visit

Hours & season

Season	Seasonal Best July-Sept. Early Oct to late June the trail and campsites are under snow and the trailhead may be unreachable Avalanche terrain

Tickets & booking

Price	Free day hike Overnight camping in the Conundrum zone needs an advance Recreation.gov permit year-round ($10/person/night May 1-Oct 31, ages 16 and under free, + $6 reservation fee) Camp only at your reserved site
Access	Free public access
Booking	Overnight stays in the hot springs zone need an advance Recreation.gov permit at a reserved site $10/person/night May 1-Oct 31

Rules

Dogs	No

On site

Camping nearby	Yes
Land manager	USFS

Not stated by the land manager: swimwear, ages.

Soak responsibly

Pack out everything, including food scraps and toilet paper. Use WAG bags where required.
No soap, shampoo or sunscreen in the pools; rinse away from the water.
Check permits and closures with USFS before you go.
Keep groups small and give others space. Respect posted dog and camping rules.

Water temperature

60°Ftemps not published125°F

This venue doesn't publish pool temperatures.

Mineral profile

Total dissolved minerals

1,910 mg/L

Highly mineralized · Calcium–sulfate (gypsum-type water)

Tap waterMineral waterSeawater

Sodium44 mg/L

Calcium500 mg/L

Magnesium1.4 mg/L

Potassium3.4 mg/L

Chloride8.6 mg/L

Sulfate1,300 mg/L

Silica38 mg/L

Temp at source: 100°F
Fluoride: 2.3 mg/L
Iron: 0.08 mg/L

Lab analysis of the source water at “Conundrum Hot Spring”, sampled 1975 by the USGS and partners (data). Pool water may be cooled, mixed or treated, and spring chemistry is generally stable over decades. We report measurements only; we don't make health claims.

What's here

Maroon Bells-Snowmass Wilderness
overnight permit required
dogs not allowed in Conundrum zone
bear-resistant canisters required overnight
WAG bags recommended; pack out waste
no campfires at designated sites
wading creek crossing during runoff
best July-September; snow and avalanche terrain Oct-June

Getting there

Elevation	11,229 ft
Road	Reached on foot From Aspen take Castle Creek Rd about 5 miles, then Conundrum Rd 1.1 miles to the trailhead Trailhead often inaccessible Oct-June
Hike	8.5 mi one way, about 2,500 ft of climbing
Trail	Conundrum Creek Trail #1981, about 8.5 mi one way Three creek crossings The third is a ford that can be hazardous in runoff
Parking	Small trailhead lot (about 25 cars) fills early No parking on Conundrum Rd Vehicles are towed
Cell service	None

Things to do near Aspen

attraction

Ashcroft Ghost Town

1880s silver-mining townsite up Castle Creek Road, run by the Aspen Historical Society

park

Maroon Bells Scenic Area

Lake and peaks west of Aspen; parking or shuttle reservations required May-Oct

town

Aspen

Resort town at the foot of Castle Creek Road with dining, lodging and supplies

Campgrounds

Trailheads

Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.

Nearby springs

Wild spring

Penny Hot Springs

Redstone, CO

Rock-ringed pools on the west bank of the Crystal River just off Highway 133 north of Redstone, partly owned and managed by Pitkin County Open Space. Access is free and year-round from a small roadside pullout. River levels decide conditions, and the pools are often under cold water during spring runoff.

Minerals2,785 mg/LCalcium–sulfate · high silica

FreeView

Resort & lodging

Avalanche Ranch Cabins & Hot Springs

Redstone, CO

A cabin ranch in the Crystal River Valley south of Carbondale with three tiered natural pools, the largest fed by a small waterfall in front of a rock grotto. Day visitors book 4-hour slots in advance, while cabin and wagon guests have round-the-clock access. Pools are drained and cleaned every Wednesday.

60°F88–105°F125°F

From $34View

Resort & lodging

Cottonwood Hot Springs Inn & Spa

Buena Vista, CO

A rustic inn west of Buena Vista with soaking tubs fed by artesian hot springs, a river cold plunge and a dry sauna. Day soaks are walk-in friendly and swimsuits are required. Lodge rooms and cabins include soaking access.

60°F85–106°F125°F

Minerals370 mg/LSodium–sulfate · high silica

From $45View

Penny Hot Springs: 23 mi · Avalanche Ranch Cabins & Hot Springs: 25 mi · Cottonwood Hot Springs Inn & Spa: 38 mi

Sources (7)

· checked November 2026

Prices, hours and rules are checked against the official site and land-agency pages. Spot something out of date? Let us know.