This seems closest to Boise, but you can check online the Idaho Fish and game:
Southwest South - Nampa Family Fishing Water
Water Description Directions Fish Facilities
The Boise River and numerous urban ponds are great fishing spots for families. They are regularly stocked with rainbow trout in the spring and fall, and many have warmwater fish such as bass and bluegill. A. Boise River: Rich with good fishing and easy access from the East Boise footbridge downstream to the Snake River.
B. Settlers Park Pond: An easy to access fishing pond in a park setting with park facilities nearby. Located at the northeast corner of Meridian and Ustick roads.
C. McDevitt Pond: Provides fishing in a park like setting. Located on the corner of Eagle and McMillan Roads in Meridian.
D. Merrill Pond: An attractive, well stocked pond in Eagle next to the Greenbelt and Merrill City Park. On Eagle Road just north of the Boise River turn east on Riverside Street, then right on Shore Drive.
E. Riverside Pond: Tucked in the trees off Glenwood Road and offers good bank fishing. Located on the corner of Glenwood Road and Riverside Drive.
F. Veteran's Park Pond: Along the Greenbelt and a short walk from a playground and park facilities. This pond sits at the back of Veteran's Park on the corner of Veteran's Parkway and State Street in Boise.
G. Quinn's Pond: Off the beaten path and popular for fishing, swimming and non-motorized watercraft. To get there go west on Main St. Turn north on 29th St. and go 3/10 of a mile and turn west on Pleasanton. Go to 31st Street and park on the left. Follow the Greenbelt to Quinn's Pond.
H. Park Center Pond: A popular fishing pond easily accessed from Park Center Boulevard just east of the Park Center Bridge. A. Boise River Fish: rainbow trout, brown trout
B. Settlers Park Pond Fish: rainbow trout, bluegill, largemouth bass
C. McDevitt Pond Fish: rainbow trout, bluegill
D. Merrill Pond Fish: rainbow trout, bluegill, largemouth bass
E. Riverside Pond Fish: rainbow trout, bluegill, largemouth bass
F. Veteran's Park Pond Fish: rainbow trout, bluegill, largemouth bass
G. Quinn's Pond Fish: rainbow trout, bluegill, largemouth bass, channel catfish
H. Park Center Pond Fish: rainbow trout, bluegill, largemouth bass, bullhead catfish, channel catfish
No Facilities Available
G. Quinn's Pond: fishing dock
H. Park Center Pond: restrooms available with access for disabled persons; fishing dock with access for disabled persons.
Blue symbols show facilities accessible to disabled persons.
i dont know the laws in your state or that state about fishing licences so try to find that out and see about any. go to google earth or maps on google and type up where you live and near the top it should have map, satalite, terain. click on map and almost all the bodies of water will be blue. i go up to 25 miles to go fishing and takes about 20-30 mins. theres also a measurment thing at the botom left of the map if you never used it before. you also need to find out if you need a licence there or not. yellowstone is a National Park in Wyoming. i hope this was helpfull.
It appears to be a 4 1/2 hour drive from Boise to the Yellowstone Territory. And they have only fly fishing. Do you fly fish Sarah?
With the Snake River winding throughout this region, Eastern Idaho fly fishing is the most highly acclaimed of all water adventures.
With hundreds of miles of dramatic rivers, people from across the globe travel to Eastern Idaho to experience "blue ribbon" fly fishing. From the most avid outdoors-man to dignitaries, fly fishing in Eastern Idaho is second to none. Occasional fly fishing tournaments and national exposure is not uncommon to Eastern Idaho's fly fishing rivers.
Plan on spending some time in Eastern Idaho to experience fly fishing the two forks of the Snake, the Henry's Fork and the South Fork, or try some of the smaller rivers such as the Teton, Fall River, Warm River, or the Buffalo; all within an easy drive of each other.
Area fly fishing outfitters are recognized as some of the best. Having fished Eastern Idaho's waters for many years, they know what to use and where to catch 'em. Come and experience for yourself fly fishing at it's finest.
I do both. Fly fishing and spincasting. At first I thought it was an hour and a half from boise. At yellowstone you can only use barbless hooks and no keepnig fish. The snake river has a huge chinook festival where people from all over come to fish. THANKS A LOT!