01 - Preheat oven to 325°F. Position rack in the lower third.
02 - Remove ham from packaging and pat dry. Optional: score fat in a diamond pattern and stud with whole cloves.
03 - Set ham cut side down on a rack in a large roasting pan. Loosely cover with foil.
04 - Bake ham for 1 hour.
05 - Combine maple syrup, bourbon, brown sugar, Dijon mustard, apple cider vinegar, black pepper, and cinnamon in a saucepan over medium heat. Simmer for 8–10 minutes, stirring, until sugar dissolves and glaze thickens slightly. Remove from heat.
06 - Remove foil. Brush ham generously with glaze. Bake uncovered for 1 hour 15 minutes, basting every 20 minutes with glaze.
07 - Increase oven temperature to 400°F for the last 10 minutes to caramelize the glaze if desired.
08 - Remove ham from oven and rest for 15–20 minutes before slicing. Serve with remaining glaze.