Undeveloped Montana Hot Springs

Guidelines When Visting Hot Springs

•  Always pack it in, pack it out. Leave no trace
•  Never bring glass bottles or containers
•  Be courteous to others, bring a swimsuit along
•  No Soap and shampoo of any kind are allowed
•  Check current conditions before you go, fires, high water, floods and closures happen

Private, Unknown or Inaccessible Hot Springs

Looking for information on a hot spring not listed below? Check this listing we compiled of Private, Unknown or Inaccessible Hot Springs
The hot springs below are known to be publicly accessable but are primitive, access is not guaranteed.

Angela Well Hot Springs

Directions:  We have not been here, these directions are from Google Maps. This one is remote and in SE Montana, from Miles City take state highway 59 for 28 miles, at Angela take a left on Road 203 for 6.2 miles, Take a left on an unamed road for 2.5 miles. At this point it will be a half mile to the west. Confirm these directions before you go.

Features:  This spring is product of an oil exploration well drilled in the 1950's. Apperently the site has shallow places to soak and a few scattered bathtubs to use as well, it is hot be careful here.

Usage:  Unknown

Temperature:  185 degrees

Overall:  This is one of the most unique hot springs in Montana. This is on private land but serveral sources claim the landowner allows access, don't screw this one up! Enjoy and leave no trace.

Angela Well Hot Springs
Photo sourced from the Geothermal Resources Council Flickr page 2012
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Boiling River Hot Spring (Yellowstone Park)

Directions:  The Boiling River is located in Yellowstone National Park just outside Gardiner, MT near Mammoth Hot Springs on the Montana border. If you are traveling from Mammoth the main parking area will be on your right after you cross from Wyoming into Montana. If you cross the bridge over the Gardner River you have gone to far. Once you park follow the path back about 1/2 mile designated river soaking area is located.

Features:  Very hot water mixes with the cooler river water to make for a perfect temperature

Usage:  Heavy

Temperature:  Varies widely, from very hot to cool

Random Information:  One of the few areas within Yellowstone where hot spring soaking is permitted.

Overall:  If your in Yellowstone don't miss this one. This spring is open as conditions allow. The area is a day use only area and will be closed during times of high water in the spring.

More Info: Check current conditons on the status of the Boiling River https://www.nps.gov/yell/planyourvisit/conditions.htm.

Boiling River Hot Springs
Photos provided by Kolin Darby Smith from our Facebook Group January 2019. Thank you!
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Gigantic Warm Spring

Directions:  Located about 14 miles north of Lewistown. Go north on US 191 nine miles from the center of Lewistown. Take a left on MT 81 for 3.7 mles, you will see a sign for Gigantic Warm Springs, take a right on Warm Spring Lane for about a mile.

Features:  Gigantic Warm Springs is self proclaimed the largest warm spring in the world and third largest spring at 50,000 GPM. Daily admission is $4 for those 14 and over, $3 for those between 13 and six, kids five and under are free.

Usage:  Heavy

Temperature:  68 degrees

Overall:  A swimming hole for the locals during the summer months. Overnight undeveloped camping onsite is $15. No pets are allowed here. Season of operation June 1st through Labor Day Weekend.

More Info: For more information check their Facebook page Gigantic Warm Spring Facebook.

Gigantic Warm Spring
Photos sourced from Gigantic Warm Spring Facebook page
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Nimrod Warm Springs

Directions:  Just west of the Bearmouth exit on I-90, look for the waterfall along the east side of the road. The typical parking area is just after the guard rail past the spring however park at your own risk, No Parking signs are posted and you are on the side of a interstate highway. For legal parking directions see this Reddit posting Nimrod Parking Directions.

Features:  The spring pool is fairly large and deep, the main attraction here is the underwater cave which you can get to by swimming under the rock face and popping up a few feet away inside the cave. I wouldn't recommend it but people do it all the time.

Usage:  Heavy, pack out your trash! Nimrod is popular with the college crowd during the summer.

Temperature:  70 degrees, This spring is rather cool by hot spring standards

Random Information:  Legend has it that this spring was much warmer and the area was home to a resort before the Interstate came though which changed the spring temperature in the 1950's.

Overall:  This spring isn't worth an extra trip out of the way but if your driving by its worth stopping.

Nimrod Warm Springs
Photos Sourced from Nimrod Hot Springs Facebook Page Nimrod Missoula
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Renova Hot Springs

Directions:  South of Whitehall, MT. Take highway 55 10 miles south of Whitehall to the Waterloo turn-off. Drive south on this road 1/2 mile, take a right after crossing the river, drive about 2 miles to Point of Rocks Road, take a left traveling north about 3.5 miles. About 200 yards before the spring there will be a small camping area to the left.

Features:  A three foot deep pool that fills like a bathtub along the side of a channel of the Jefferson River. You will need to bring two plastic party cups (or something equivalent) to plug the pipes draining the pool. As of fall 2018 the hottest water has moved several yards above or below the main pool. There are hand built pools here for soaking.

Usage:  moderate

Temperature:  Temperature 122 degrees at the hottest springs.

Random Information:  Be aware that this spring can be under water during high water or unusable during extreme low water. Check the gauge station on the Jefferson River near Silver Star for information. Around 700 cfs is a good river flow. Due to the recent changes at the spring it is more susceptible to the river flow then prior years.

Overall:  This spring is worth the drive, there are several attractions in the area including Lewis and Clark Caverns and Upper Potosi Hot Springs. Please be respectful, in recent years there have been issues here Alcohol Incidents

Renova Hot Springs
Top photos provided by @bchotspringer Instagram 2017
Bottom photo provided by Jeff Birkby 2018
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Upper Potosi Hot Spring

Directions:  West of Pony, MT.   To reach Pony take highway 287 to Harrison, MT.  Once you reach Pony follow the signs to Potosi Campground, about 8 miles from Pony. Once you reach the campground the walk to the springs which is about an easy mile from the trailhead.  The springs will be on your left surrounded by a log rail fence.

Features:  A small pool large enough for five or six people. There used to be a second smaller pool here, it may still exist as well. Camping is nearby at the Willow Creek USFS campground at the trailhead.

Usage:  moderate

Temperature:  110 degrees at the source, cooler in the second pool

Overall:  If your in the area its worth checking out. There are several good hiking trails in the area to explore as well.

Upper Potosi Hot Springs
Photos sourced from AllTrails.com User Submitted Photos
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