Yellowstone NP
August 16, 2002


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Midway Geyser Basin






Excelsior Geyser Crater

In the 1880s Excelsior Geyser erupted in bursts 50 to 300 feet high. The thermal violence formed the jagged crater and apparently ruptured the geyser's underground system, causing eruptions to cease after 1890.

On September 14, 1985, Excelsior roared back to life with forty-seven hours of major eruptions. It is impossible to predict when this dormant but powerful geyser's next eruption will occur.

Though its eruptions have been erratic, the geyser's outflow is nearly constant, pumping more than 4000 gallons of boiling water per minute over the crater rim into the Firehole River.





Grand Prismatic Spring
The bright colors are Bacteria living in the hot water.


Opal Pool


Firehole Pool

Fountain Lake Drive


Surprise Pool


Steady Geyser


Hot Cascades


Black Warrior Lake


Firehole Lake


Young Hopeful Geyser

Fountain Paint Pots






Clepsydra Geyser


We spotted this guy from Fountain Flat Drive


Resting in the grass!


After a long day we were greeted on return
to our camp at Fishing Bridge.

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