The use of a bicycle is prohibited—

(a) On the Savage River Loop Trail; the Savage Cabin Trail; the Triple Lakes Trail; the McKinley Bar Trail; and the Eielson Area Trails; and

(b) Within the Frontcountry Developed Area as defined by § 13.970 except on park roads, road shoulders, and in public parking areas, or on trails and areas designated for bicycle use by the Superintendent. A map of the designated trails and areas open to bicycle use is available for inspection at the park visitor center and on the park Web site.