Season - Episode

44 Season 44 Oct 22, 2025
43 Season 43 Oct 23, 2024
42 Season 42 Oct 18, 2023
41 Season 41 Oct 19, 2022
40 Season 40 Oct 20, 2021
39 Season 39 Oct 21, 2020
38 Season 38 Oct 02, 2019
37 Season 37 Oct 24, 2018
36 Season 36 Oct 04, 2017
35 Season 35 Oct 12, 2016
34 Season 34 Sep 23, 2015
33 Season 33 Sep 24, 2014
32 Season 32 Sep 04, 2013
31 Season 31 Oct 10, 2012
30 Season 30 Oct 19, 2011
29 Season 29 Sep 26, 2010
28 Season 28 Oct 25, 2009
27 Season 27 Oct 26, 2008
26 Season 26 Oct 28, 2007
25 Season 25 Oct 24, 2006
24 Season 24 Nov 06, 2005
23 Season 23 Nov 07, 2004
22 Season 22 Oct 19, 2003
21 Season 21 Oct 13, 2002
20 Season 20 Sep 09, 2001
19 Season 19 Oct 22, 2000
18 Season 18 Oct 24, 1999
17 Season 17 Oct 11, 1998
16 Season 16 Oct 12, 1997
15 Season 15 Oct 13, 1996
14 Season 14 Oct 08, 1995
13 Season 13 Oct 02, 1994
12 Season 12 Oct 03, 1993
11 Season 11 Oct 05, 1992
9 Season 9 Sep 30, 1990
8 Season 8 Oct 08, 1989
6 Season 6 Sep 20, 1987
5 Season 5 Oct 19, 1986
4 Season 4 Oct 20, 1985
3 Season 3 Sep 30, 1984
2 Season 2 Oct 09, 1983
0 Season 0 Jan 01, 1970

Overview

The Sierra Nevada, a mountain range running about 400 miles along the eastern side of California and stretches into Nevada, is home to three national parks: Sequoia, Kings Canyon and Yosemite. This is a land of giants, whether speaking of trees soaring to nearly 300 feet, or massive stone monoliths far taller than any skyscraper. But the force that has given rise to the earth's largest living trees and carved out the iconic natural landmarks of the Sierras is water. The role that water has played in the creation and evolution of Yosemite Valley cannot be overstated - feeding its numerous wild rivers and countless waterfalls, and making life in this stone wilderness possible. The second force, crucial to the Giant sequoias' ability to reproduce, is fire. It is the delicate balance of these two elements, water and fire, that is vital to the continued existence of the wildlife and trees that inhabit the Sierras. Despite the recent heavy rains and snowfall, scientists are finding that water is scarcer and the threat of fire is more likely as the area continues to experience rising temperatures upsetting that important balance. Geologists, ecologists, researchers and adventurers investigate how the changing climate is affecting one of America's greatest wildernesses.

Year
Studio
Crew
Popularity 33.5754
Language English