Directions Dry rub seasonings onto tri-tip. Preheat smoker to 180 degrees. Place tri-tip on smoker and smoke for 3 hours. Remove from smoker and rub garlic olive oil over entire roast. Wrap with tinfoil. Increase temperature to 225 and continue to cook for 1 more hour. Remove from smoker and let rest 10 minutes. Slice & Serve.