Colorful shore of the Grand Prismatic Spring, Yellowstone National Park
Grand Prismatic Spring is the largest hot spring in Yellowstone. The colors around shore are bacteria and algae that tolerate 170 degree F temps. There is a boardwalk along GPS but it hard to visualize the colors at ground level so I found a trail from the Fairy Falls parking lot - it is an easy walk - about 15 minutes from the trailhead. There are some trails cutting up hill to informal viewpoints - it is well worth the climb - what an amazing sight!
I took this photo on a gorgeous day in Yellowstone National Park in May 2009. Absolutely beautiful morning as I headed from West Yellowstone SE through various geyser basins, including the Lower, Midway, and Upper Basin. Each one was different but all were worth stopping at. Enjoy the photos!