- Bail Bonds, Marathon
- Bakeries, Marathon
- Balloons - Novelty, Toy & Decorative, Marathon
- Banks, Marathon
- Baptist Churches, Marathon
- Barber Shops, Marathon
- Barbers, Marathon
- Bars, Marathon
- Bars & Grills, Marathon
- Bathroom Fixtures, Marathon - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Battery, Marathon - Retail Batteries Stores
- Battery Storage, Marathon
- Beach & Water Related Services, Marathon
- Beauty Salons, Marathon
- Bedding Manufacturers Supplies, Marathon
- Bedroom Furniture Stores, Marathon - Master & Kids Bedroom Furniture Sets & Beds
- Beer Taverns, Marathon
- Beverage Stores, Marathon
- Bicycle & Motorcycle Services, Marathon
- Bicycle Rentals, Marathon - Bike Rental
- Bicycle Repair & Service, Marathon - Bike Repair Shops
- Blood Testing & Typing, Marathon
- Boat & Yacht Charter, Marathon
- Boat & Yacht Charters, Marathon
- Boat Covers, Tops & Upholstery, Marathon
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- Boat Fishing Charters & Tours, Marathon
- Boat Lifts & Hoists - Sales & Repair, Marathon
- Boat Motors & Marine Equipment Dealers, Marathon
- Boat Services, Marathon
- Boat Storage , Marathon - Equipment & Services
- Boat Trailers, Marathon
- Boats & Yachts, Marathon - Yachts, Sailboats & Boats for Sale
- Bonds, Marathon
- Bookkeeping Services Commercial, Marathon
- Bookkeeping Systems & Services, Marathon
- Books, Magazines & Newspapers Stores, Marathon - Bookstores
- Boutiques & Boutique Items, Marathon
- Breakfast Restaurants, Marathon
- Builders & Contractors, Marathon
- Builders & Contractors - More, Marathon
- Building & Home Inspection, Marathon - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Marathon - Construction Management & Consulting
- Building Hardware & Materials, Marathon
- Building Materials, Marathon - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Marathon
- Business & Professional Associations, Marathon
- Business Legal Services, Marathon
- Business Services, Marathon
- Business, Vocational & Technical, Marathon
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