Grizzly Fumarole becomes a series of mudpots during the spring and early summer meltoff, but later in the summer starts to spew steam and gases. When we went in early June, Grizzly Fumarole was still a collection of little mudpots.
Just as we arrived at Old Faithful, the geyser had just finished erupting. We went inside the Visitor Center and found out the the geyser wouldn't be erupting for an hour and a half. We decided to hike the 1.3 mile Geyser Hill Trail.