| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | New River Gorge National River |
October 7, 2017
ABC (US)
|
20 | |
| S04E02 | NYC: National Parks of New York Harbor |
October 14, 2017
ABC (US)
|
20 | |
| S04E03 | Biscayne National Park |
October 21, 2017
ABC (US)
|
20 | |
| S04E04 | Glacier: Back in Big Sky Country |
October 28, 2017
ABC (US)
|
20 | |
| S04E05 | Jasper National Park |
November 4, 2017
ABC (US)
|
20 | |
| S04E06 | Churchill, Canada |
November 11, 2017
ABC (US)
|
20 | |
| S04E07 | Coconino National Forest |
November 18, 2017
ABC (US)
|
20 | |
| S04E08 | Katmai: Return To The Valley of 10,000 Smokes |
November 25, 2017
ABC (US)
|
20 | |
| S04E09 | Bears Ears National Monument |
January 20, 2018
ABC (US)
|
20 | |
| S04E10 | San Juan National Forest |
January 27, 2018
ABC (US)
|
20 | |
| S04E11 | White Mountain National Forest |
February 3, 2018
ABC (US)
|
20 | |
| S04E12 | Devils Tower National Monument |
February 10, 2018
ABC (US)
|
20 | |
| S04E13 | Santa Fe National Forest |
February 17, 2018
ABC (US)
|
20 | |
| S04E14 | Florida Parks: Hurricane Recovery |
February 24, 2018
ABC (US)
|
20 | |
| S04E15 | Best of Caves |
March 3, 2018
ABC (US)
|
20 | |
| S04E16 | Cayman Islands |
March 10, 2018
ABC (US)
|
20 | |
| S04E17 | Jean Lafitte National Historical Park |
March 17, 2018
ABC (US)
|
20 | |
| S04E18 | Best of Rivers and Waterfalls |
April 7, 2018
ABC (US)
|
20 | |
| S04E19 | Best of Conservation |
April 14, 2018
ABC (US)
|
20 | |
| S04E20 | Best of the Rockies |
April 21, 2018
ABC (US)
|
20 | |
| S04E21 | Northern California |
April 28, 2018
ABC (US)
|
20 | |
| S04E22 | Grand Canyon National Park: Rim to Rim |
May 5, 2018
ABC (US)
|
20 | |
| S04E23 | Denali: Dog Sledding |
May 12, 2018
ABC (US)
|
20 | |
| S04E24 | Santa Catalina Island |
May 19, 2018
ABC (US)
|
20 | |
| S04E25 | Superior National Forest |
May 26, 2018
ABC (US)
|
20 | |
| S04E26 |
Nevada: The Loneliest Road in America
season finale
|
June 2, 2018
ABC (US)
|
20 |
No artwork of this type.
No artwork of this type.
No artwork of this type.