Fun along the riverfront for people and pets — that’s Dominion Riverrock. The three-day festival, billed as “the nation’s premier outdoor sports and music festival,” drew enthusiastic crowds who enjoyed everything from daredevil cyclists to trail runs and kayaking during the weekend. These scenes offer a taste of the activities: Emiliano Gimenez of Madrid, Spain, who is ranked No. 25 internationally by the World Slackline Federation, has an audience as he goes high on a slackline.