Hours Of Operations Slam Dunk Washington Sunnyside 98944 Slam Dunk Hours of Operation and Location in Sunnyside, WA 98944 4.5 - 66 votes 2010 Yakima Valley Hwy, #39, Sunnyside, WA 98944 (509) 839-3822 Get Directions Slam Dunk Hours Category: Sports Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore SunnysideView More Apparel CarharttBig 5 Sporting GoodsCarter'sJCPenneyDots Sports Big 5 Sporting GoodsVansColeman Recommend For You Design Nail Alex Barber Shop Alex's Barber Shop Unique Hair Design Sunny Nails Usa Nails New Image Design Nail Shop Blanca's Beauty Salon Snack Shop