Written By: Bitumen, dense, highly viscous, petroleum-based hydrocarbon that is found in deposits such as oil sands and pitch lakes (natural bitumen) or is obtained as a residue of the distillation of crude oil (refined bitumen).
  About 3.5 hours-maybe 4 depending on road construction. The hardest part is getting out of Miami to Key Largo-then it's a 2 lane highway through all the keys to Key â¦ West with alot of traffic lights in between. If you are coming from Miami-definitely take the toll road.
Driving distance from Boca Raton, FL to Key West, FL. The total driving distance from Boca Raton, FL to Key West, FL is 209 miles or 336 kilometers. Your trip begins in Boca Raton, Florida. It ends in Key West, Florida.