Yellowstone Lamar Valley area

On our fourth day in Yellowstone National Park we visited the Lamar Valley area, all the way to just before the northeast entrance, then over to Mammoth Hot Springs, and around the upper loop:

Bison:

Tower Falls:

Interesting rocks:

Bison in Lamar Valley:

NE Entrance Road:

Bison in Lamar Valley:

Elk in Mammoth:

Mammoth terraces:

Waterfall:

Sheepeater Cliff:

Bison strolling on the road: