- Labor Organizations, Castlegar
- Labor Unions, Castlegar
- Land Surveyor, Castlegar - Land Surveying Services
- Landscape Contractors & Designers, Castlegar
- Landscaping, Castlegar
- Laundromats & Dry-Cleaning, Coin-Operated, Castlegar
- Lawn & Garden Equipment & Supplies, Castlegar
- Lawn & Garden Services, Castlegar
- Lawn Hydroseeding, Castlegar
- Lawn Maintenance Services, Castlegar
- Lawn Mower Repair & Blade Sharpening Service, Castlegar
- Lawn Mowers & Power Equipment, Castlegar
- Lawyers & Attorneys, Castlegar
- Legal & Tax Services, Castlegar
- Legal Professionals, Castlegar
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- Libraries, Castlegar
- Life Insurance, Castlegar
- Lighting Fixtures & Equipment, Castlegar
- Lingerie & Underwear for Women, Castlegar - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Castlegar
- Loans Personal, Castlegar
- Locks, Castlegar
- Locksmiths, Castlegar - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Castlegar
- Lodging, Castlegar
- Lodging Services, Castlegar
- Long Haul Trucking Companies, Castlegar
- Lumber & Lumber Products, Castlegar
- Lumber & Lumber Products, Castlegar
- Lumber Companies, Castlegar - Wholesale, Manufacturers & Suppliers
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