Morning Geyser, Fountain-type geyser in Fountain Paint Pots, Lower Geyser Basin, Yellowstone National Park, Wyoming, United States

Morning Geyser plays from a pool just beyond Fountain Geyser, visible from the Fountain Paint Pots boardwalk. Eruptions come as successive jets rather than a steady stream, often beginning with a "blue bubble" like Fountain's. Maximum height reaches 200 feet (61 m) and about the same width, though most eruptions are smaller and last around 30 minutes.

The geyser was first documented in 1899 under a different name and underwent major changes following the 1959 Hebgen Lake earthquake. That seismic event altered underground plumbing and pressure systems, shaping the eruption patterns we see today.

The name "Morning's Thief" comes from the belief that this smaller vent beside Morning's pool steals the energy Morning needs to erupt. In 2013, however, the two were seen erupting at the same moment, contradicting that idea. Visitors on the Fountain Paint Pots boardwalk can watch Morning's Thief, which has erupted often in recent years.

Stay on marked boardwalks since the ground is extremely hot and eruptions are unpredictable in timing. Wear sturdy shoes and bring water, especially on warm days or if you plan to explore other features in the basin.

This geyser follows an unusual pattern, alternating between active phases with frequent eruptions and long dormant periods. Some visitors return year after year without seeing an eruption, while others are fortunate enough to witness multiple eruptions in a single day.