West Thumb Geyser Basin is one of the smaller geyser basins in Yellowstone, yet its location along the shore of Yellowstone Lake and is ranked as the most scenic. This area was formed by volcanic explosion that took place more than 150,000 years ago. After the volcano exploded, the area collapsed and filled with water over time. It gets its thermal abilities from the enclosed magma trapped in the ring fractures that developed over time.In the 1990's several underwater geysers were discovered. These geysers can be seen as bulges underground, especially during the summer months. The basin is also special because of its location in Yellowstone. The West Thumb Geyser Basin is located on the edge of Yellowstone Lake.

This area features many other springs in the area. As surprising as it is, this area is also one of the least visited areas within Yellowstone. There are boardwalks all along the basin, making it an easy walk to see the beautiful hydrothermal springs in the area. West Thumb's name is derived from the thumb-like projection of Yellowstone Lake and the name was given by the 1870 Washburn Expedition. It was also known as Hot Spring Camp. West Thumb has less geyser activity than other basins. However, amazingly for its size it has all — hot springs, pools, mud pots, fumaroles and lake shore geysers.