I'm glad you remembered this Sheila, I had forgotten all about your trivia quiz! Guess nobody else new the answer either, huh... or they didn't want to keep guessing like me.
I love history!
I found this info on Wikipedia about Colter's Hell:
Colter's Hell is an area of fumaroles and hot springs on the Shoshone River near Cody in the US state of Wyoming. The thermal area covers about a square mile at the mouth of the Shoshone's canyon. Its thermal activity has declined ever since its description by mountain man John Colter, who passed through the region in the winter of 1807-1808. Colter's account of the features on what was then called the Stinkingwater River has subsequently been confused with the much more extensive and powerful geysers in Yellowstone National Park, which Colter may not have actually visited.[2]
Other early descriptions of Colter's Hell date back to the trapper Joseph Meek in the year of 1830 as well as to Plenty Coups, a chief of the Absarokee Indians, who camped with his tribe at the thermal area in 1840. Meek had seen geyser basin in Yellowstone and described Colter's Hell in similar terms, implying that there were active geysers at his visit. Today the area consists of hot springs and steam vents.[2] Several extinct geyser or hot spring cones stand up to 30 feet (9.1 m) high on the riverbank. Other hot springs were located near the confluence of the north and south forks of the Shoshone, now drowned under the reservoir created by Buffalo Bill Dam.[3]
The notion that Colter's Hell referred to one of the geyser basins of Yellowstone first appeared in Hiram M. Chittenden's 1895 book Yellowstone National Park. However, Chittenden went on to describe a "tar spring" on the Stinkingwater as well under the same name. Chittenden's speculation contradicts the earliest published description of the site in Washington Irving's account of Captain Benjamin L.E. Bonneville's journals of Bonneville's scouts' visit to the location in 1833, the same year that another of Bonneville's survey parties discovered the geyser basins of Yellowstone along the Firehole River.[3]
Colter's Hell is just to the north of US 14-16-20 on the west side of Cody. It was listed on the National Register of Historic Places in 1973.[1]
thanks for telling me the real story