Billings' first West End dog park set to open Saturday Opening noon at Centennial Park For the first time in 30 years, Billings will open a new park Saturday, and among its features is the first dedicated space designed specifically with dogs in mind. and last updated 2021-06-03 16:56:04-04 BILLINGS â For the first time in 30 years, Billings will open a new park Saturday, and among its features is the first dedicated space designed specifically with dogs in mind. Centennial Park, located at 32nd Street West and St. Johns Avenue, will officially open its approximate 20 acres Saturday at 12 p.m. with a ribbon-cutting from Mayor Bill Cole and a number of family-friendly activities, including food trucks and live music.