Upper Terrace Drive Reopens after Thermal Activity Causes Closure

Subscribe RSS Icon | What is RSS
Date: July 21, 2015

July 21, 2015            15-046    

Julena Campbell or Amy Bartlett
e-mail us 
The Upper Terrace Drive near Mammoth Hot Springs in Yellowstone National Park reopened to vehicles on Monday after rangers temporarily closed the road due to a new thermal feature that was impacting the drive.

Maintenance crews installed temporary concrete Jersey Barriers and eliminated three parking spaces around the thermal feature to help protect the feature from visitor and vehicle impacts.

“The activity is changing and the thermal feature is evolving,” said Dr. Hank Heasler, park geologist. “The Jersey Barriers are a temporary measure to allow vehicle access to the Upper Terrace Drive while options are investigated.”

The thermal feature became visibly active this May near the Upper Terrace parking lot and began flowing from a new spot under the edge of the pavement last week.

Geologists drilled two holes 20 inches deep into the pavement to investigate the presence of water under the roadbed. Thermal water is now streaming at approximately one gallon of water per minute from one of the holes.

Staff will continue to monitor the thermal feature and reassess restrictions as needed.

          - www.nps.gov/yell -

About the National Park Service. More than 20,000 National Park Service employees care for America’s 408 national parks and work with communities across the nation to help preserve local history and create close-to-home recreational opportunities. Learn more at www.nps.gov.


Follow YellowstoneNPS on YouTube Facebook Twitter flickr Instagram
The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Last updated: July 22, 2015

Contact the Park

Mailing Address:

PO Box 168
Yellowstone National Park, WY 82190-0168



Contact Us