Lake St. Clair, located between Michigan and Ontario, is a renowned fishery for smallmouth bass. While individual preferences may vary, the following lures have historically been favorites among many anglers for targeting Lake St. Clair smallmouth bass in early October:

1. Tube Baits: A soft plastic tube in green pumpkin, watermelon, or smoke colors can be incredibly effective. The tube imitates gobies, a primary forage for smallmouth in Lake St. Clair.
2. Crankbaits: Medium-diving crankbaits in shad or perch patterns can be excellent choices. During early fall, baitfish are still very active, and bass are feeding aggressively to prepare for winter.
3. Drop Shot Rig: Paired with soft plastics like the Roboworm or minnow imitations can be very effective in the deeper waters where smallmouth might be staging. Natural colors like green pumpkin, morning dawn, or Aaron’s magic are often popular choices.
4. Spinnerbaits: A white or shad-colored spinnerbait can work wonders, especially on windy days. The vibration and flash can attract bass from a distance.
5. Swimbaits: Soft plastic paddle tail swimbaits, such as Reaction Innovations Little Dipper, in natural colors like shad, perch, or goby patterns can be effective, especially when retrieved slowly.
6. Jerkbaits: As the water starts to cool down in October, jerkbaits like the Megabass Vision 110 or Lucky Craft Pointer can be effective, especially in more transparent water conditions. These lures mimic wounded baitfish, triggering predatory instincts in bass.
7. Jigs: Football jigs with a craw trailer or hair jigs can be particularly effective on rock piles and other structures where smallmouths may be lurking.

Remember, while these are general recommendations, the best approach is to stay adaptable. Monitor the water temperature, clarity, and forage activity, and adjust your tactics accordingly. Talking to local anglers or visiting local bait shops can also provide updated information on the current hot lures for any given year.