Travel Reference
In-Depth Information
Alum and other creeks join the Yellowstone River in Hayden Valley, creating an area like a small lake.
Eight miles up Alum Creek, the government's first attempt to save the buffalo was made in
1895-96, a time when public sentiment was strong for trying to keep the magnificent animal
from extinction. The animals were penned up for feeding in winter. Some segments of fence
still stand, but no buffalo were actually saved in this effort.
Looking south from Alum Creek, you can see the steam from Sulphur Mountain, also
called Crater Hills, a hot spring and mud pot area. Early tourists who took the Central Plateau
route reached this hydrothermal region by a side road. However, the area is no longer open to
visitors unless accompanied by a ranger.
11.3/4.1 Mary Mountain Trailhead and interpretive sign on the east side. This is the
north end of Hayden Valley and a place where waterbirds large and small love to congregate.
Mary Mountain Trail across the road leads southwest across Hayden Valley and the Cen-
tral Plateau to rejoin the Grand Loop Road near Lower Geyser Basin about 20 miles (32 km)
from here. Prime grizzly habitat, the entire area is closed to overnight camping.
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