Black River High School Panthers Shop Featuring Black River High School Panthers T-Shirts, Sweatshirts, Hats & Jerseys. PrepSportswear.com is your leading source for Black River High School Panthers Apparel, Merchandise, Gear, Sportswear and Clothing for every sport and activity, including Black River High School Panthers Football, Black River High School Panthers Basketball, Black River High School Panthers Baseball, Black River High School Panthers Softball, Black River High School Panthers Soccer, and Black River High School Panthers Lacrosse! Choose from an endless variety of Black River High School Panthers Merchandise including T-Shirts, Sweatshirts, Hoodies, Hats and Jerseys. Customize your design and personalize the back of your Black River High School Panthers Gear to show your Panthers spirit and support your favorite sport! Shop www.PrepSportswear.com for Panthers Merchandise. Black River High School: 7800 S 132nd St, Seattle, Washington