Station Name: Boiling River at Mammoth,YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,686 feet

Nearest Address:
N Entrance Rd
Yellowstone National Park, WY 82190
Park County

GPS Coordinates: 44.9851333, -110.6893444

Nearby Water Temperatures

Heat Advisory issued July 24 at 9:39PM MDT until July 26 at 9:00PM MDT by NWS Billings MT

Effective: Fri July 24, 2026, 9:39 PM
Expires: Sat July 25, 2026, 9:45 PM

* WHAT...Hot conditions with high temperatures of 90 to 100. Saturday is expected to be the hottest day. * WHERE...Portions of central and south central Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Heat Advisory issued July 25 at 5:19AM MDT until July 26 at 9:00PM MDT by NWS Riverton WY

Effective: Sat July 25, 2026, 5:19 AM
Expires: Sat July 25, 2026, 10:00 PM

* WHAT...Very hot conditions with high temperatures from 95 to 102 degrees. * WHERE...Lower elevations of central and north-central Wyoming, east of the continental divide. * WHEN...From noon today to 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or late evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Heat Advisory issued July 25 at 2:26AM MDT until July 26 at 9:00PM MDT by NWS Billings MT

Effective: Sat July 25, 2026, 2:26 AM
Expires: Sun July 26, 2026, 2:30 AM

* WHAT...Hot conditions with high temperatures of 90 to 100. Today is expected to be the hottest day. * WHERE...Portions of central and south central Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Heat Advisory issued July 25 at 12:48PM MDT until July 26 at 9:00PM MDT by NWS Riverton WY

Effective: Sat July 25, 2026, 12:48 PM
Expires: Sun July 26, 2026, 7:00 AM

* WHAT...Very hot conditions with high temperatures from 95 to 102 degrees. * WHERE...Lower elevations of central and north-central Wyoming, east of the Continental Divide. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Some locations will not see temperatures fall below 90 degrees until sunset. Temperatures at midnight will still be 75 to 80 degrees. Overnight low temperatures eventually bottom-out in the mid to upper 60s.

Drink plenty of hydrating fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or late evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Heat Advisory issued July 25 at 10:52AM MDT until July 26 at 9:00PM MDT by NWS Billings MT

Effective: Sat July 25, 2026, 10:52 AM
Expires: Sun July 26, 2026, 11:00 AM

* WHAT...Hot conditions with high temperatures of 90 to 100. Today is expected to be the hottest day. * WHERE...Portions of central and south central Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.