[2] Grand's fountain reaches a height of as much as 200 feet (61 m), with a duration of 9 to 12 minutes.

Its eruptions occur in a series of 1 to 4 (rarely as many as 5) bursts.

Grand has been known to rarely experience over half a dozen restarts in a single eruption period.

[4] As of 2018, Grand Geyser has become extremely predictable, with nearly every eruption being 6–7 hours apart.

Upon the finish of an eruption, Grand's pool is empty and takes about five hours to refill.