You can spend an hour here and enjoy it. If you have a little More time it will be worth it. The exhibits are top notch. The history of the railroad, the Indian culture, the Sierra and the building f the highway are all detailed. It’s kid friendly. The museum store is excellent for books on the area and other memorabilia. The staff is knowledgeable and friendly. The museum is free but they charge for parking. However, if you park on Donner Pass Rd in front, walk 100 meters, it’s free t.