| Facilities: Unknown Reservations: Reservations are not needed or accepted for Arrowrock Reservoir. Best Time To Visit: Arrowrock Reservoir is open year-round. Fees: Unknown Accessibility: Unknown Rules: Check local fishing regulations. Any bull trout caught must be released immediately. Directions: To reach Arrowrock Reservoir from Boise, take Highway 21 north to Forest Road 268. Drive past Lucky Peak Reservoir to Arrowrock Reservoir. | 
