One of my big adventure priorities is to camp/hike/explore at the Grandview Whistlestop. Knowing how much snow they get up there, I don't think this trip would be feasible or enjoyable until mid-July. You buy a train ticket ($110rt) to depart from the Portage train station. Once you get on the train, in winds through a river valley, up a mountain, and through some tunnels, and then the train stops on the tracks and drops you off in Grandview, an old, abandoned trading route in the middle of the wilderness between Portage and Seward. You hop off the train, find a spot to set up your tent, and start exploring!

The Forest Service has just recently put in some trails (and they plan to install mountain huts to create a longer hut-hop trail), but it sounds like you can explore glaciers and alpine meadows and peaks. Camp for as many days as you'd like, then be at the train platform in time to catch the northbound train and come home!

(Attached pic not mine...yet.)