I know I posted this somewhere, too.
Nebraska: Lincoln, NE, Hi-Way Diner; Virginia's Cafe; McCook, NE, "Our Place."
I noticed many searches haven't drummed up breakfast diners in the Black Hills area, and since Mt. Rushmore and all the touristy stuff is out here, I'd better post this as I live here and am in the know about good foodie places. So here it goes:
Black Hills, South Dakota area: (Rapid City, Sturgis, Rochford, Spearfish, Deadwood, Hot Springs, Custer)
Rapid City: Cambell Street Cafe (Under Happy Jacks in phone book). It's where the locals go. GREAT people watching. Go early. They close at 1:00 p.m. Fantastic bacon, always great service.
Alpine Inn, Hill City, SD: An old miners' hotel transformed and kept period, serving some of the best German breads, desserts and sausages. I don't know if it's open for breakfast. It's one of the few places that pleases both tourists and locals. Get there early. There's often a line, despite whatever weather or time of year.
J-9 Cafe, Hill City: good and greasy. Good people watching. Almost always open.
Bay Leaf Cafe, Hudson St, Spearfish: Absolutely wonderful, has many pies/soups, all fresh. Check hours. Local chef. Call ahead.
Rochford, (Just south of Deadwood) Moonshine Gulch Saloon: There is so much atmosphere, I can't even begin. Bring a camera. Used to be an old stable during Deadwood's gold rush period. Place looks like it's falling down, but well worth the stop. The menu ENTIRELY depends upon the friendly owner, Betsy's mood. Homemade, hand-cut french fries, not from a distributor. Sometimes, she's open around breakfast, sometimes not. That's part of the charm, I guess.
Mt. Rushmore (the actual Mt. Rushmore, not just a diner in Keystone, SD) : I can't believe I'm posting this. This May a friend got a buy one, get one free coupon for breakfast at this touristy place. I just assumed it would be bad, and went with a negative attitude (there are more than one restaurants to avoid in Keystone, trust me). I was pleasantly suprised. While this was in May, and not the height of tourist season, the breakfast was awesome. I had biscuits and gravy. The biscuits were fresh and fluffy; the gravy homemade and peppery; the eggs were good, and the bacon thick. I was very suprised.
Hope this helps tourists!
**It should be noted that during the motorcycle rally, (first week in August) some of these restaurants change their menus around (making portions smaller and raising prices) or shut down altogether. Best to ask a local what places do not change their menus at this time.