Caulk boots, calk boots, or cork boots (pronounced "cork" and usually called "corks") are spike-soled boots worn by loggers, tree planters and other forestry laborers in many places, but particularly associated with the lumberjacks of the timber-producing regions of the Pacific Northwest and Canada. They are worn for traction in the woods and especially in timber rafting, and were part of the traditional lumberman's basic equipment, along with axe, peavey and crosscut saw.
- "Logging Operations", OSHA
- "Caulk Boots", Stanhope Heritage
- "Women and Timber: The Pacific Northwest Logging Community, 1920 - 1998: Glossary". Center for Columbia River History. Retrieved 2008-01-08.
- "...spiked-soled boots were introduced across the New Zealand logging industry..." Archived 2015-09-23 at the Wayback Machine., NZ Dept. of Labour
- "Ottawa Valley Expressions". Retrieved 2008-01-08.
- "TIMBER!! LUMBERJACKS, LOGGERS & TREES", Chik-Wauk Museum and Nature Center
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