This was an adventure! I took my kids, ages 8 and 9, and I was a little stressed out about the trains. There are many areas where it is narrow and not a lot of room on the sides of the tracks, and I worried about getting stuck in that section if a train rolled through. You're stuck basically walking either on the tracks, or on the rock, which is actually tricky to walk on and found it was worth the stress to just walk on the tracks. Stay on the EAST side of the tracks on the way in and out; the west side is really narrow and you'd basically be pinned against a rock face if a train came through. We had one train go by, but we had basically found a nice wide spot to sit and enjoy some snacks and wait for one so we knew we'd likely be clear the rest of the way there. The train ended up stopping, actually, and we continued on while it was stopped and moved aside once it started moving. The falls themselves were magical and absolutely gorgeous. My kids enjoyed the adventure. We parked on Dunsmuir Avenue and walked down through Shasta Retreat, and had no problems at all. We always eat at Yak's after a hike in the area because they have delicious food!