The 48-bed hospital is located south of downtown Arlington on a 17-acre (6.9 ha) property; Cascade Valley also operates five medical clinics and a freestanding ambulatory surgery center.

[1][2] The hospital campus was rebuilt in 1987, and the district later expanded to cover most of northern Snohomish County in 1996.

[2][3] A major $45 million renovation was completed in 2010, adding a new building and remodeling the hospital to expand emergency services to accommodate a growing number of patients.

[7] After evaluating new partners, including UW Medicine and Providence Health & Services,[6] Cascade Valley announced in 2016 that it would merge with Skagit Regional Health, the operator of Skagit Valley Hospital in Mount Vernon.

[8] The two hospitals had already partnered in 2011 to build a medical clinic in Smokey Point, near Arlington, and Skagit has run outpatient chemotherapy programs for Cascade in the past.