In a small saucepan, combine the sugar, 1 cup of water, and a pinch of salt. Heat over medium, stirring until the sugar and salt completely dissolve. Remove from heat and let cool slightly.
In a large pitcher, combine the lemon juice and the cooled syrup.
Add the remaining 3 cups of cold water.
Fill the molds about ¾ of the way.
Place the lid on the popsicle mold and add the sticks. Place in the freezer for about 4 hours or overnight.
Remove the popsicles from the freezer and enjoy!