Pit the cherries. Turn on a television show or some music, as this is going to be a good minute or two or more like 2 hours!
In a saucepan, combine 4 cups of cherry juice, sugar, ClearJel, and cinnamon over medium heat and bring to a boil, stirring constantly until thickened.
Add lemon juice and boil for 1 minute.
Add the cherries and bring to a boil.
Fill each jar leaving 1 inch headspace and remove air bubbles.
Wipe each jar rim clean and add on the lids and rings.
Place the jars in a boiling-water canner with 1 inch of water over the jars.
Process pint jars for 35 minutes, adjusting for your altitude.
Turn off the heat and allow the canner to cool for 5 minutes.
Remove each jar from the canner and place them onto a towel-lined countertop and do not disturb them for up to 12 to 24 hours.
Store them in the pantry for up to 1 year.