June 23, 2019

Today was a mixture of excitement and sadness as we headed into our last real day in Yellowstone. We started off the morning with a walk through Upper Geyser Basin, just outside the Old Faithful Inn. We were dazzled by the array of different hot spring formations—pools of bubbling blue water, billows of fluffy white steam, rings of red thermophiles, and fountains of water spewing from deep within the earth. A few of our favorite features included the Beehive Geyser (with a cone shaped like—you guessed it—a beehive), Spasmodic Geyser (with water spewing every which way), and the Grand Geyser. The Grand Geyser was particularly spectacular—it erupted high into the sky, up to 180 ft. Water gushed into the sky for about 8 minutes, and just when we thought it was over, it erupted a second time with an even higher column of super-heated water. Afterwards, Ranger Rebecca led us on a tour through Upper Geyser Basin. She explained the various mechanisms of how geysers work, pointed out the bobby sock trees (long dead after absorbing silica), and shared her urgency / passion for environmental conservation.

From there, we started our long trek back to Bozeman, which included several stops along the way. First, we stopped at Black Sand Pool, locally known as “Thumper.” Megan told us to lay down in the dirt around the pool. Although it sounded like a strange request, we complied and laid in a ring around the bubbling pool. We waited…and waited. At first, nothing. And then, without warning, a thump came from deep within the earth. It felt like a giant was trapped beneath the surface and was knocking to escape. We could feel the thud against our backs and hear the hollow sound reverberate against the rock. Megan explained that these thumps were caused by explosions of super-heated water underground. So cool!!

We also stopped at the Fountain Paint Pots. There were several geothermal formations there as well, including geysers, steam vents, and mud pots. The mud pots were an unusual sight—a cesspool of bubbling mud swirled with pinks and yellows. Bacteria and acid play a key role in these formations. Bacteria in the ground produces sulfuric acid, which in turn breaks down the surrounding rocks, producing a mud pool. It was interesting to compare the mud pots to the geysers we saw earlier in the day.

Besides sight-seeing, we also had some final group-bonding moments. A few days ago, we decorated our vans. Amidst all of our excursions across Yellowstone, both of our white vans have accumulated a thick layer of mud and dust. Of course we could have figured out a way to wash it off, but instead we decided to write a tally of all the wildlife we’d seen. Our vans were a hit with the tourists! We caught several groups today pointing at our vans and taking pictures, gawking at the collection of wildlife we’d seen.

At lunch, we played a competitive (and hilarious) Yellowstone-themed game of charades. We rolled with laughter as various teammates acted out “badger hunting uinta,” “pika,” “Grand Prismatic,” “Megan,” and “rock snot.” We ended the day with our final team meeting, where we shared out highlights and appreciations from the trip. Needless to say, we ended the day with heavy hearts that our adventure is coming to a close. However, at the same time, we could not say enough to express the joy, appreciation, and inspiration we’ve experienced on this trip. It has been truly remarkable and awe-inspiring—a trip we will never forget!!