From Madison:

• Take Hwy 18-151 West approximately 20 miles to Blue Mounds area.
• Turn left (south) on Hwy F at intersection of 18-151 & Hwy. F
• Take first right turn on Blackhawk Drive into Blue Mounds Industrial Park
• Midwest Prototyping is the first building on the left at 10949 Blackhawk Drive.

Note that Blackhawk Drive is new and does not yet appear on most maps, including the Google Map on the right. The Red mark indicates its approximate position.