1. Combine sugar, 1/4 cup water, and mint in a small saucepan over medium heat; cook 4 minutes or until sugar dissolves, stirring frequently. Let stand 30 minutes. Strain through a sieve over a bowl; discard solids.
2. Combine mint syrup, berries, and juice in a blender; process until smooth.
3. Divide mixture evenly among 9 (4-ounce) ice-pop molds. Top with lid; insert craft sticks. Freeze pops overnight or until set.