Sudden Valley is a census-designated place (CDP) just outside of Bellingham in Whatcom County, Washington.

[citation needed] The Community Association of Sudden Valley began as "the Ranch".

By 1969, the County Commissioners approved the first plan for 158 lots west of Lake Whatcom Boulevard.

In December 1976, ownership and control was transferred to the newly named Sudden Valley Community Association.

Ufkes served on the Board for two years in the early 1970s and is credited for urging property owners to buy the golf course and all its subsidiaries for $1.4 million.

From this point on, the SVCA held the title to all the roads, parks, greenbelt, recreation facilities, marina, airstrip, and the country club.

Sudden Valley offers activities for all ages and abilities, including a marina, library, parks, playgrounds, miles of hiking trails, and an 18-hole golf course designed by the architect Ted Robinson.