Place the chuck roast into a resealable container or bag.
Add the marinade. Seal and toss to coat.
Fire up your smoker for cooking at 250 F.
Shake off any excessive marinade and sprinkle the roast with the chipotle chili powder.
Smoke for two hours.
Transfer meat to a large piece of foil and seal tightly.
Return to the smoker and smoke another 4-5 hours or until the internal temperature reaches 200 F.
Remove from the smoker and let rest 30 minutes before slicing or chopping.