Preheat pellet smoker 185°F with alder, maple, or fruit wood pellets.
Place salmon on a large piece of foil skin side down.Squeeze lemon juice over salmon. Sprinkle entire salmon with garlic, salt, and pepper then dill. Top with lemon circles. Once the grill is preheated, place salmon and foil on the grill with the skin side down.
Smoke until internal temperature reaches 140°F. Salmon should no longer be translucent and will easily flake off. Smoke time depends on salmon size and thickness.Let rest 5 minutes then serve. Store leftovers in an airtight container in the refrigerator for 5-7 days.