I went a few years ago while visiting family in the Yukon! We only went to Haines and Skagway though. If you go to Skagway, there's a train ride you can take and you get some BEAUTIFUL views, waterfalls, forest, the moss-overgrown chilkoot trail, and I believe it's the tallest narrow-guage railway in existence. The bridges are a little scary
White Pass & Yukon Route Railroad - Skagway, Alaska