Lake Granby offers multiple boat ramp access points in the Arapaho National Recreation Area: Stillwater Boating Site (two-lane ramp with courtesy dock, restroom, and gin pole) and Sunset Point Boating Site (single-lane ramp with similar amenities), plus Roaring Fork for non-motorized watercraft only.

All motorized boats require Colorado Parks and Wildlife inspection for aquatic nuisance species, with access available only when inspectors are present. An ANRA day-use fee ($5/day or annual pass options) is required for parking at these facilities.