Push Back the Fog

Push Back the Fog is an achievement/trophy in the Fallout 4 add-on Far Harbor.

Requirements
Unlock 3 Far Harbor workshop locations.

General information
There are a total of 4 workshop locations in Far Harbor. These locations are:
 * Longfellow's cabin
 * Dalton farm
 * National Park visitor's center
 * Echo Lake Lumber

Longfellow's cabin
The following steps are required to unlock this workshop:
 * Talk to Old Longfellow located in the Last Plank.
 * After following him to Acadia, you will gain access to Longfellow's cabin workshop.

Dalton farm
The following steps are required to unlock this workshop:
 * Talk to Cassie Dalton located just in town, and she will assign the quest Blood Tide.
 * Upon completing the second stage of the quest by travelling to Dalton Farm and killing the fog crawler, turn in this stage of the quest to gain access to the Dalton Farm workshop.

National Park visitor's center
The following steps are required to unlock this workshop:
 * Finish one of the optional tasks in the quest Living on the Edge.
 * Obtain the quest, Rite of Passage from Teddy Wright.
 * Complete this quest by doing what's called the "Captain's Dance" to unlock the next quest, The Changing Tide.
 * A part of this quest will require you talk to Mitch. He's found in the Last Plank.
 * Mitch will then ask the Sole Survivor to find his Uncle Ken at the National Park visitor's center itself.
 * Upon talking to Uncle Ken, you will gain access to the National Park visitor's center workshop.

Echo Lake Lumber
The following steps are required to unlock this workshop:
 * Finish one of the optional tasks in the quest Living on the Edge.
 * Obtain the quest, Rite of Passage from Teddy Wright.
 * Complete this quest by doing what's called the "Captain's Dance" to unlock the next quest, The Changing Tide.
 * A part of this quest will require you talk to Small Bertha. She's found in & around the Last Plank.
 * Bertha will then give the Sole Survivor a quest called Turn Back the Fog, leading to the Echo Lake Lumber location.
 * Completing this quest & turning it in to Bertha will allow access to the Echo Lake Lumber workshop.