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Out in the world · Idaho

Idaho
champion trees.

Remarkable trees, a place to begin. Explore the register, get to know the species, and bring a little attention outdoors.

121 listed records121 records with map points23 Library species represented
Explore the Idaho map →Register & coverage ↓

The register behind the map

Dates, sources & coverage.

University of Idaho June 13, 2019 register · retrieved October 11, 2026

Published register ↗Tree program ↗

121 records are included in this imported selection. 121 have approximate map points; 0 remain searchable without a marker. Multiple trees can share one town or county point.

Register editions, retrieval dates, and individual measurement dates describe different things. This snapshot does not confirm current tree condition. Approximate map points do not locate individual trees or establish permission to visit.

How this register was selected and mapped

121 Idaho state-champion records across 117 published species and varieties, from all 17 table pages of the University of Idaho’s June 13, 2019 register, retrieved October 11, 2026. Both trees in each of four state co-champion pairs remain separate records. The European white birch’s combined state and national co-champion designation is retained as a historical source label; national comparison trees in other states are excluded. The program page still links this register and warns that some trees may no longer be alive. This dated snapshot does not confirm current champion status or condition.

All 121 records use 29 approximate Census county points. They do not locate individual trees or establish visiting permission. Published “Adam” is matched to Adams County. The golden weeping willow’s Cambridge / Idaho County location conflicts with another Cambridge listing in Washington County; its published county is retained and flagged for confirmation. Owner and nominator names, detailed locations, street addresses, and tree coordinates are omitted.

Scientific names, varieties, measurements, and points remain as published. DBH and circumference are in inches; height is in feet. The PDF’s “1/4 AVE. CROWN” column is quarter-average crown spread in feet: we retain that original value and multiply it by four to display full average spread. Nomination years are shown separately; no measurement dates are inferred.

Full source links on the shared map →

A glimpse of the register

Look up. Look closer.

These are four of the highest published heights in this imported selection, when available. Measurements come from different dates; this preview creates no new champion or national titles. Open a record for its status, measurement context, and source notes.

Clearwater County

western white pine

Pinus monticola

Published height
229 ft
Published points
482

Date in record: Not listed

Explore this record →

Clearwater County

Rocky Mtn. Douglas-fir

Pseudotsuga menziesii var. glauca

Published height
224 ft
Published points
465

Date in record: Not listed

Explore this record →

Valley County

ponderosa pine

Pinus ponderosa var. ponderosa

Published height
182 ft
Published points
423

Date in record: Not listed

Explore this record →

Boise County

Engelmann spruce

Picea engelmannii

Published height
181 ft
Published points
486

Date in record: Not listed

Explore this record →

From a record to a relationship

Get to know the trees.

These Library species appear in Idaho’s imported register. Explore identification, seasonal observations, and a practice beside a tree. Photographs are species references taken elsewhere. Matches use scientific names without regard to capitalization; botanical synonyms remain separate.

A place to begin outdoors

Plan a thoughtful visit.

We have not published a Idaho visit guide yet. Start with a tree you can visit with permission nearby, or explore our guides in other states.

A five-minute practice with any tree →Explore available visit guides →
Open the Idaho map →Return to a familiar tree →