Located at 2282 Bellevue Street near HWY 172. Check our website for map. The Mossakowski Family Dog Park is a non-profit dedicated to growing and developing off-leash community dog park.safe, enjoyable, well-maintained area. Laura & Peter Mossakowski Family Dog Park (Bellevue Dog Park) is a volunteer-based, non-profit 501(c)(3) organization. The Dog Park committee is dedicated to providing an off-leash dog park where dogs and their owners/friends have a safe, well-maintained area for recreation and socialization. The Dog Park committee will also make it their focus to educate children about safe behavior around dogs to ensure a common goal of safety and fun for all. The Dog Park relies on local and private funding to continue growth and development of this off-leash dog park.