Morning Glory Pool


Long a favored destination for park visitors, Morning Glory Pool was named in the 1880s for its remarkable likeness to its namesake flower. However, this beautiful pool has fallen victim to vandalism. People have thrown literally tons of coins, trash, rocks, and logs into the pool. Much of the debris subsequently became embedded in the sides and vent of the spring, affecting water circulation and accelerating the loss of thermal energy. Through the years Morning Glory's appearance has changed as its temperature dropped. Orange and yellow bacteria that formerly colored only the periphery of the spring now spread toward its center.

*Adapted from the NPS Old Faithful Area Trail Guide and the Old Faithful Area Interactive Map

Feature Type

Not Reported

Inventory ID



Latitude: 44.47503
Longitude: -110.8435
Survey Date: June 19, 1999

Geographic Area: Firehole River Drainage
Thermal Region: Upper Geyser Basin
Thermal Complex: Morning Glory Group
Ranger District Contact: Old Faithful District, Colleen Rawlings (307) 344-2701

Feature Data

Data Source Supplied By Sample Date Temp Vent Temp pH Cond Extended Data
Park 6/19/1999 69.8°C 72°C 5.81 2100 µS/cm No
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