Going from Mystery Lake to Coastal Highway?

[LostHope]

I watched a few video's, read a few guides. Seem to remember something being said you could travel from one area to the other. I started in Mystery Lake and looked around the collapsed tunnel but do not see a way to go to Coastal Highway, if there is one. Can we? Or is that delete current and start there?

[wynarator]

Follow the rails in the other direction.

[LostHope]

Going the other way(away from the tunnel) leads to the lake and then on to the dam. The tunnel has been mentioned as the way to Coastal Highway.

[LostHope]

My apologies. Found a video with the title of my question and the way they showed it was very close to the dam. Thanks!