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1986 Map of Trischman Knob
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1986 Map of Trischman Knob

USGS Topo · Published 1986

About this map

Yellowstone National Park terrain dominates this 1980s survey, defined by the hydrological divide of the Continental Divide and the descent of mountain waters into Bechler Canyon. The landscape is a complex network of drainage and vertical drops, particularly concentrated around the Three River Junction. Here, the Bechler River is fed by tributaries like Phillips Fork and Gregg Fork, creating a series of named waterfalls including Ferris Falls, Tendoy Falls, and Gwinna Falls. To the south, the massive Pitchstone Plateau rises as a prominent landmark, while the namesake Trischman Knob stands near the eastern boundary. The absence of roads is notable, with only a Pack Trail winding through the canyon system. This map provides an essential view of the park's wilderness character before modern digital mapping, capturing the exact placement of remote features like Betchelder Column and Quiver Cascade.

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Map Details

Date Portrayed1986
Date Published1986
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions20.3 x 26.8 inches

Editions of this 1986 Trischman Knob Map

This is the sole edition of this map. No revisions or reprints were ever made.

Historical Maps of Three River Junction Through Time

222 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain