Current use is governed by an agreement with the City entered into in 1968. Support Research grants and contracts. Usage Fee None. Communication Radio, cellular phone. Access Access is controlled by the City of Seattle and is allowed by permit only.
Access is difficult, seasonal, and limited to a one-mile foot trail or helicopter.
The terrain is alpine and talus, ranging from flat lands to cliffs. The area is primarily forested, with a mixed stand of old growth mountain hemlock and silver fir.