Welcome to SI Marine Management!

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Barker's Island Marina

SI Marine Management logo

Welcome to SI Marine Management!

SI Marine Management image We're delighted to be reaching you online! We are celebrating our 43rd year as a full-service marine business. With our two full service marinas on Lake Superior, Barker's Island Marina and Knife River Marina, we're experienced servicing both the sailing and power boating communities. We look forward to the opportunity to assist with finding your next boat or the sale of your current boat.

Happy Boating!

Joe Radtke

Featured Boat
photo of 40' J Boats J/40
40' J Boats J/40
1987 US$ 104,900

Beautiful, spacious, and elegant are a few words to describe this boat. Teak interior throughout and more than enough accommodating space.  She has been well cared for by a caring owner.

This boat has it all.

  • Sleeps 6
  • Teak throughout 
  • 2 heads
  • 2009 Custom fitted winter cover
  • Autohelm ST-4000 
  • Windlass
  • Force 10 heater

Check out the full details for all the gear.


SI Marine Management

250 Marina Drive
Superior, WI 54880, United States

Toll-free 866-733-7416
Tel 715-392-7131
Fax 715-392-7133
Email Us


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