20th century map depicting the North Pacific region
Juneau was a port city in eastern Alaska, US, and was located near the Gulf of Alaska. (TOS: "The Cage")
In 2286, while Earth was under inadvertent ecological attack by the Whale Probe, Juneau was one of the cities affected by thick cloud cover that blocked out sunlight. (Star Trek IV: The Voyage Home)
This city was identified on a political map of the North Pacific region. This map was accessed from the USS Enterprise library computer by the Talosians in 2254.