Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon: Audiobook
According to The Books Insider's catalog data, the Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon audiobook runs 13.1 hours unabridged, narrated by Danny Campbell (about 8.7 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 13.1 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 27 days |
| 1 hour / day | 14 days |
| 2 hours / day | 7 days |
| 1 hour / day at 1.5× | 9 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 13.1 hours, it runs longer than 76% of the 7,179 World audiobooks in our catalog.
More narrated by Danny Campbell
Danny Campbell narrates 320 unabridged audiobooks in our catalog, 3,127 hours in all.
About as long, on the World shelf
930 World audiobooks in our catalog run within 10% of this length. The most popular on the store:
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon is an audiobook by Edward Dolnick: a 13.1-hour unabridged recording, read by Danny Campbell, released June 11, 2019, on the World and The Americas shelves.
The listen at a glance
- Length
- 13.1 hrs
- Narrated by
- Danny Campbell
- Released
- June 11, 2019
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- World, The Americas
- ISBN
- 9780062939135
How to listen to Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon free
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Start listening freeQuestions listeners ask
How long is the Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon audiobook?
Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon runs 13.1 hours unabridged. At 1.5× speed that drops to roughly 8.7 hours.
Is the Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon?
Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon is narrated by Danny Campbell.
Is Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon worth listening to at 1.5× speed?
At 1.5× you'd finish in about 8.7 hours, saving 4.4 hours.