Not sure what you mean?  I think the Meadows Trail pieces can be merged fairly easily since they're tagged the same, but the ridgeline trail pieces have different tags so you need to watch out for that.  What you want to do in this case is make a "hiking trail" relation that puts all the pieces together that have different tags - commonly used to make a trail out of differing path types like if part of a trail is a road for cars.  LMK if you need more details or tell me a bit more about what you'd like to do and I could do it...