Bring TWO stock pots or deep pots 3/4 full of water to a boil.
In one of the boiling pots, place your jars and lids in for 1-2 minutes, making sure they are fully covered with water. This will clean them. Remove with tongs or jar lifter.
In a sauce pan over high heat, add sugar and water and combine until sugar is dissolved. Set aside.
Prepare a large bowl with ice water.
In the other stock pot, blanch peaches by placing the peaches in the boiling water for 30-45 seconds. This helps the peaches peel easier.
When done, immediately remove and place in the ice water to stop the peaches cooking.
Peel the peaches and slice them, removing the pit.
If needed, heat the syrup back up so that it is hot.
Fill a 1 qt jar with peaches and cover with the syrup leaving 1/2 inch from the top. Tap jar to remove air. Clean the edges of the jar where the lid goes and screw on the lid.
Repeat until all syrup and peaches are used.
In the FIRST stock pot full of boiling water, that you used to clean the jars, place the closed jars into the pot. Make sure they are covered by at least 2 inches of water.
Let boil for 30 minutes. Use a canning jar lifter to remove them. Let the jars come to room temperature. They should seal within the first 12 hours. If they do NOT they need to be refrigerated.