Just to the north west of Old Faithful Geyser area you will find Biscuit Basin Nature Trail. This is a moderately difficult trail that never leaves me exhausted because it is just over 2 miles long. It is a lovely trail that shows you the Upper Geyser Basin from a distance.
When you hike along Biscuit Basin you will see the destruction of what forest fires can do in Yellowstone National Park. You will see burned trees lying down on the ground with a few trees still standing upright. More trees are bringing forth new life as they are just starting to grow in the soil where the burned trees once stood. It is one of the mysteries of a fire that these tiny seeds can spout into trees after being in a hot forest fire.
Biscuit Basin has many geysers that smell much like rotting eggs. The geysers will erupt occasionally as you hike along the trail. At one time the geysers had little lumps of formations surrounding the edges of the geyser holes which gave the area the name Biscuit Basin since the lumps looked like little biscuits. But an earthquake has shaken them apart and now all you see are small lumps to remind us of the larger ones that once existed.
The Biscuit Basin area has a strong sulfur smell that many people find offensive but I enjoy it. If I see a particularly good cloud of steam floating over the path I will stand in it and enjoy a little steam bath. This is fine on a warm day but if you stand in the steam long enough you will get wet and get cold. If you wear glasses the sulfur in the steam can get on the glass and make your glasses hazy.
As you walk along the trail you will find Mystic Falls which is a waterfall that drops down approximately 70 feet to the rocks below. You can stand and listen to the powerful water from the Firehole River pound down the waterfall as it rushes over the rocks.
The Biscuit Basin area is a great place to take a hike in Yellowstone National Park. You can see geysers in the distance and up close. You also can see the Firehole River and the Mystic Falls. If you would like to read more about the Biscuit Basin area in Yellowstone National Park you can go to http://www.naturevalleytrailview.com/yellow-stone/mysticfalls/#/trail-1.