The Lake Michigan Problem
333 miles of open water with steep, closely spaced waves (3-5 second period) that can roll boats. Lake Michigan is the crux of any attempt — it's where time is made and lost. Weather windows are everything. June through August, early morning starts before afternoon thermal winds build.
Fuel Strategy
At race pace (60-70 mph), fuel burn is 100-200+ gal/hr. Total trip requires 600-1,500+ gallons. Traverse City and Charlevoix are the only viable mid-route fuel options. A one-stop strategy versus two-stop could save 20-30 minutes but requires enormous tank capacity.
Commercial Shipping
The Straits of Mackinac and the St. Clair/Detroit River system carry heavy Great Lakes freighter traffic. These thousand-foot ore carriers don't maneuver quickly. The 6-mile Straits crossing is the highest-risk segment — narrow, high traffic, currents, and fog.
The Final 36 Miles
Lake St. Clair averages 11 feet deep — you're in marked channels or you're aground. The Detroit River is an international border (US-Canada). Multiple no-wake zones in harbors, rivers, and channels. The last 36 miles are the slowest by mandate, not by choice.
Weather Windows
Optimal: June-August. Monitor NOAA marine forecasts. Cold fronts can produce 3-4 foot waves within hours. The 1990 Norris run hit 9-foot waves and still finished. The question is whether a modern attempt waits for glass or runs through whatever shows up.
Michigan Law
55 mph speed limit unless 1+ mile offshore on the Great Lakes. Multiple no-wake zones in harbors and rivers. USCG notification recommended for high-speed transit. VHF Channel 16 for Coast Guard, Channel 13 for bridge-to-bridge.