The Terra Cotta Geysers are located in the Upper Geyser Basin of Yellowstone at the footbridge near Sawmill geyser. There are two active geysers, A and B. Terra Cotta A is the most common and is the one in the movie below. Terra Cotta A is usually seen a few times a week but I couldn't find anyone that had a recent closed interval for it.

Terra Cotta A Geyser September 2001:

Terra Cotta movie (0.9 Mb, 10 sec)

Image copyright 2001, Michael Frazier. All rights reserved.