On day four of our Yellowstone trip, we drove down from the Madison Campground to Old Faithful, exploring the Midway Geyser Basin on the way.

With a little detour for bison by Fountain Flat Drive:

Midway Geyser Basin:

Boardwalk:

Runoff:

Blue thermal pool:

Jenn:

Green thermal pool:

Boardwalk and geysers:

Geysers:

Then on to the Old Faithful area; here’s the visitor center:

Old Faithful lodge:

Old Faithful geyser, with a crowd watching it erupt:

Back at the campground, and the nearby Madison river: