Preheat oven to 250º.
Line a baking sheet with aluminum foil.
Put the sugar, corn syrup & butter in a small saucepan & stir to combine.
Stirring constantly, bring the mixture to a boil & cook for 5 minutes.
Add the pecans & stir to combine. Remove from heat.
Spread the pecans, in a single layer, on the prepared baking sheet.
Bake for 1 hour, stirring frequently.
Remove from the oven & cool completely before serving.
Store at room temperature in an air-tight container.