Allyhoo811 wrote: »There is a quest that takes you to Cold Harbor after you complete the main story in the last zone of your faction. I believe the quest is called "Messages Across Tamriel". Check your journal and see if you have that. Otherwise, you probably still need to finish your faction's story.
Alternatively, you can just travel to a guild member who is currently in Coldharbor. You don't even need to ask them. You can just find someone from your Guild menu.
Allyhoo811 wrote: »No, you don't have to be Level 50 to finish the main quest. I believe you can get the last mission for that as early as Level 45. However, I'm not referring to the main quest with the prophet...I'm talking about the main story of your alliance (with Ayrenn, Jorunn, or Emeric).