Hells Gate State Park/Marina Share: Recreation and Tourism Hells Gate State Park/Marina Visit Website 5100 Hells Gate Road Lewiston, ID 83501 (208) 799-5015 (208) 799-5187 (fax) Hells Gate State Park Facebook Hours: The park is open from dawn until dusk The office is open 8 am to 4 pm seven days a week About Map About Four miles south of downtown Lewiston, the park offers 93 camping units, trails, swim beach, group picnic shelters, information center and full service marina. Directions Take Snake River Ave South for 4 miles from the city center.