Giant Geyser, one of Yellowstone National Park’s most spectacular geothermal features, appears to be entering another period of increased activity after years of relatively rare eruptions.
According to the U.S. Geological Survey (USGS), the geyser erupted on June 26th, 2026, before settling into a pattern of eruptions every one to two weeks throughout August, September, and October. Its most recent eruption occurred on October 13th, raising hopes that the geyser could continue its impressive displays through the winter and into next summer.
Giant Geyser Is Showing Signs of Life
Located in the Upper Geyser Basin not far from Old Faithful, Giant Geyser is the second-tallest geyser in Yellowstone, trailing only Steamboat Geyser. During an eruption, boiling water and steam can shoot approximately 200 feet (60 meters) above its cone.
However, Giant Geyser is known for its unpredictable behavior. It can go years between eruptions before suddenly entering a stretch of frequent activity. The geyser was particularly active in 2018 and 2019, putting on repeated displays for visitors to Yellowstone. Its activity subsequently declined, with only isolated eruptions recorded in 2023 and 2025.
That makes the recent resurgence especially encouraging for anyone fascinated by Yellowstone’s geothermal wonders.
Will Giant Geyser Keep Erupting?
The recent pattern suggests Giant Geyser could be entering another active phase, although its long history of unpredictable behavior makes future eruptions difficult to forecast.
The USGS is hopeful that the geyser will continue erupting regularly throughout the coming winter and into summer 2027. If that happens, visitors could have more opportunities to witness one of the park’s tallest and most dramatic geyser eruptions.