f 4.5, 1/1250 sec, ISO 800, 330mm
I traveled to Yellowstone in August to photograph the park and its wildlife. I spent a lot of time in Lamar Valley because it has one of the largest concentrations of wildlife in the park. One evening before dusk, I pulled off at one of the scenic pullouts to watch some elk, when this grizzly bear ambled up. The elk immediately left while the grizzly bear started foraging about. At one point, he made a short sprint, stopped, and began foraging around again. I was able to capture a few frames of him running.