Cromwell Park was dedicated on August 30, 2010, in a lively ceremony that drew over 200 residents, showcasing the community's dedication to improving local recreational spaces. Attendees engaged in various activities, including sports games and exploring new walking trails, while enjoying live music from a rock band. The park's enhancements include a stage, baseball and soccer fields, a basketball court, and a children's play area, designed to foster community interaction and promote an active lifestyle. A notable addition is the public art piece, Raintree, created by Kristin Tollefson, which integrates with the park's natural environment and reflects its stormwater management features. Funded through the 1% for the Arts Program and a 2006 bond issue approved by voters, these improvements also aim to enhance water quality in the Thornton Creek Basin.

The park's design incorporates native vegetation and sustainable practices, demonstrating a commitment to environmental stewardship. This dedication event symbolizes not just the opening of a park but also a community's investment in health, recreation, and ecological awareness. Cromwell Park stands as a testament to Shoreline's efforts to create engaging public spaces for its residents.