 In 1856, in response to these tensions, Fort Alden was built in the area that would become Snoqualmie.No alliances were made between the tribes in the east and the tribes in the west, and Fort Alden was abandoned (along with other forts built around this time).The most successful early pioneer in the Valley was Jeremiah Borst, who arrived in the spring of 1858 over the Cedar River trail from the eastern side of the mountains.