Preheat your Traeger grill to 225* with the super smoke feature enabled
While the grill heats, slice the peaches in half and remove pits
Cut the limes in half
Place the peach halves and the lime halves on the grill and close the lid
Allow the fruit to smoke for at least 20 minutes, until heated through and somewhat caramelized
Pull the fruit from the grill and place on a cookie sheet or pan in the refrigerator
Refrigerate the fruit until cold throughout
*optional: pull the skins off the peach halves, if desired
Place the peach halves in the blender
Squeeze the lime juice and some pulp into the blender jar
Close the lid and puree until the fruit is smooth
Open the jar and add the rum and sugar, mixing to combine
Pour in the ice cubes and blend on high until consistently smooth
Transfer to a glass and serve with a lime round