Set aside 10 cherries. Stir together sugar and remaining cherries in a large bowl, and let stand until cherries release juices, about 10 minutes. Add lemon juice; stir until sugar has dissolved and liquid is bright pink. Transfer to a pitcher. Stir in 6 cups cold water and reserved cherries. Serve over ice.
**Also try 3 cups non-carbonated water and 3 cups sparkling water to give it a crisper taste!