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Who really said it

The mountains are calling and I must go

Written by John Muir 1838–1914 · Scottish-American naturalist & father of the U.S. national parks
Verified Free to reuse

Confirmed. Muir wrote it in a letter to his sister Sarah Muir Galloway from Yosemite Valley on 3 September 1873; the holograph survives at the University of the Pacific ↗ and it was printed in The Life and Letters of John Muir (1923). The catch: the famous line is only the first half of Muir’s sentence.

Last verified 16 Jul 2026 · how we verify · spot an error?

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Verified quote & credit

“The mountains are calling and I must go” The mountains are calling and I must go, and I will work on while I can, studying incessantly. —John Muir, letter to his sister Sarah Muir Galloway, September 3, 1873

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In context

Evoking the world of John Muir — Naturalist, writer & father of the U.S. national parks. Theme: "The mountains are calling and I must go". Atmospheric and restrained, cinematic directional light, a muted period-appropriate palette, fine grain and texture. Compose with generous empty space for the quote and a small credit line. No lettering in the image itself.

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Minimalist editorial slide for the quote "The mountains are calling and I must go". Clean background, a single muted accent color, generous negative space, subtle paper or linen texture, no literal illustration — let the words carry it. Reserve clear space for a serif quote and a small credit line. No lettering in the image itself.

Provenance

The source

Source
Letter to his sister Sarah Muir Galloway, from Yosemite Valley
Written
3 September 1873
First published in
The Life and Letters of John Muir, ch. 10 (1923)
Manuscript
Holt-Atherton Special Collections, Univ. of the Pacific

The mountains are calling and I must go, and I will work on while I can, studying incessantly. Letter, 3 Sep 1873

The famous version stops at “must go.” Muir’s sentence keeps going — the calling was to relentless work and study, not just to wander.

Original letter
Muir’s handwritten letter, Univ. of the Pacific
The Life and Letters of John Muir, ch. 10

How we know

Public domain

Muir wrote the letter in 1873; it was first published in The Life and Letters of John Muir (1923). Both the writing and its first publication predate 1931, so the text is in the public domain in the United States.

Fact-check

What actually gets misquoted

The words really are Muir’s — the trouble is what posters and mugs leave off.

Truncation on merchandise & posters mis-worded

Muir’s full sentence runs “…and I must go, and I will work on while I can, studying incessantly.” Dropping the second half turns a line about relentless work and study ↗ into a pure call of the wild.

Countless reprints embellished

Popular versions often insert a comma (“The mountains are calling, and I must go”) and an exclamation point that Muir’s manuscript letter ↗ does not contain.

Genuinely John Muir — a verbatim clause from an 1873 letter to his sister ↗, routinely quoted at half length.

Context

Why it mattered

Muir wrote the line at 35, just back from a punishing five-week solo expedition among the High Sierra glaciers. Far from a tourist’s daydream, it was a report to his sister on why he could not settle to a desk: the peaks pulled him back, but so did an obsessive program of measurement and study that would help make the case for saving Yosemite.

Read whole, the sentence captures the two halves of Muir’s life — wonder and work — that would soon feed the campaign for national parks and the founding of the Sierra Club.

The calling was to work and study — not just to wander.

Explore

Filed under

More provenance-checked quotes on the same theme, each with its reuse status.

Purpose Freedom

Go further

Dig deeper

Trusted places to keep pulling the thread — primary archives, fact-checks, and scholarship. We show how we used each one before you leave.

John Muir Exhibit — Favorite Quotationsvault.sierraclub.org

Sierra Club’s sourced list attributing the line to the 3 Sept 1873 letter.
The Life and Letters of John Muir, ch. 10vault.sierraclub.org

Full 1923 text where the line first appeared in print.
Letter to Sarah Muir Galloway, 1873 Sep 3 (manuscript)scholarlycommons.pacific.edu

Archive record for the original holograph in the John Muir Papers.
Were the mountains “calling” Muir?scholarlycommons.pacific.edu

Univ. of the Pacific exhibit on the full wording and how it gets truncated.
The mountains are calling, and I must goonverticality.com

Deep-dive tracing the quote to the 1873 letter and its full context.

The author

Who was John Muir?

John Muir

1838–1914 · Naturalist, writer & father of the U.S. national parks

John Muir (1838–1914) was a Scottish-born American naturalist, glaciologist and writer whose lyrical accounts of the Sierra Nevada helped establish Yosemite and other national parks. He co-founded the Sierra Club in 1892 and served as its first president, becoming the most influential voice of early American conservation.

For writers & researchers

Cite this

Primary source — Chicago

John Muir to Sarah Muir Galloway, 3 September 1873, in William Frederic Badé, ed., The Life and Letters of John Muir, ch. 10 (Boston: Houghton Mifflin, 1923); original manuscript, John Muir Papers, Holt-Atherton Special Collections, University of the Pacific.

MLA (9th ed.)

Muir, John. Letter to Sarah Muir Galloway. 3 Sept. 1873. The Life and Letters of John Muir, edited by William Frederic Badé, Houghton Mifflin, 1923.

APA (7th ed.)

Muir, J. (1923). Letter to Sarah Muir Galloway (September 3, 1873). In W. F. Badé (Ed.), The life and letters of John Muir. Houghton Mifflin.

This verification page

Quotle.info. “Who really said ‘The mountains are calling and I must go’?” Last verified 16 Jul 2026. https://quotle.info/who-said/the-mountains-are-calling-and-i-must-go

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