The Snake River begins its journey in Yellowstone National Park.
"The Tetons and the Snake River is a black and white photograph taken by Ansel Adams in 1942, at the Grand Teton National Park, in Wyoming. It is one of his best known and most critically acclaimed photographs." Wikipedia. Photo in Public Domain. See also https://www.nps.gov/places/000/snake-river-overlook.htm
Adventures along the Snake River
American Falls—search American Falls Idaho videos for more . . .
1000 Springs, Hagerman ID
From Boise we took off I-84 at Bliss, headed down in the valley of Hagerman/the Snake River via Hwy 30. Hagerman is about 1.5 hours southeast of Boise. I wasn't sure what to expect, and I missed my best opportunity to pull off the road and get a good picture of 1000 Springs. But it is worth seeing. There are other things to see in the area, as the videos above and below will show.
Glenns Ferry http://www.elmorecountypress.com/hilitingglennsferry1.htm
The Boise River, Owyhee River, Malheur River, Payette River, and the Weiser River all contribute to the Snake near Ontario OR.
Hells Canyon of the Snake River
Ways to get to Hells Canyon from Oregon
Hells Canyon Creek Visitor Center, at Hells Canyon Dam
Snake river and Minor Tributaries…Hells Canyon Dam (fish)
Hells Canyon Dam to Pittsburg Landing
Idaho--Hells Canyon & Clearwater confluence
I've been in a wheelchair for 30+ years. It poses some challenges for traveling. Maybe others can benefit from my experiences.