Yellowstone’s Old Faithful geyser is so named because it can be counted on to erupt every 90 minutes or so. We were lucky enough to see two such eruptions. On the July day when we were there, a crowd of perhaps 1,000 people watched from the nearby boardwalk. Below is my sketch, and click here to see my 30 second video of the second eruption we saw. The park ranger said it was an unusually dramatic one.
