Islewood Dam, located in Skagit, Washington, is a privately owned structure primarily used for recreation. Built in 1971, this earth dam stands at a hydraulic height of 17.6 feet and a structural height of 12.3 feet, with a length of 120 feet. The dam has a storage capacity of 39 acre-feet, with a normal storage level of 24 acre-feet and a surface area of 8 acres. It serves the purposes of irrigation and recreation, impacting the drainage area of 0.13 square miles in the Tr-Lake Erie watershed.

Despite being privately owned, Islewood Dam falls under the regulatory oversight of the Washington Department of Ecology, with state jurisdiction, permitting, inspection, and enforcement in place. The dam is classified as having a high hazard potential, yet its condition assessment is rated as fair as of the last inspection in September 2020. The emergency action plan for the dam was last revised in July 2010, and it meets regulatory guidelines.

Congressional District 02, represented by Rick Larsen (D), encompasses the area where Islewood Dam is situated. With its picturesque location and recreational opportunities, this dam is a significant feature in the Skagit region of Washington for water resource and climate enthusiasts to explore and appreciate.