Cascade is an urban neighborhood abutting Downtown Seattle, Washington, United States, located adjacent to South Lake Union. It is bounded by: Fairview Avenue North on the west, beyond which is the rest of the Cascade Neighborhood; the Interstate 5 interchange for Mercer St to the north, beyond which is Eastlake; Interstate 5 on the east, beyond which is Capitol Hill; and Denny Way on the south, beyond which is Denny Triangle.