Webpages like Colorado Knife Law and others list Colorado law pertaining to concealed knives as such:

These knives are illegal to carry concealed:

All knives less than 3.5 inches are legal.

All fishing and hunting knives of any length are legal.

All knives over 3.5 inches are illegal.

So, can I carry a concealed 6 inch filet knife in Colorado? Any help would be appreciated.


Colorado Revised Statutes, 18-12-101 and 105. It's a fishing knife. But you might get a ticket or even arrested. The fact that it's a fishing knife is an affirmative defense.

Edit to add: relevant podcast - http://www.lifeofthelaw.org/2015/06/opinel-no-5/ (story about a guy who gets arrested carrying an Opinel no. 12 in TN)

  • It might be useful if you quote some relevant parts of the podcast, in case that link breaks.
    – jimsug
    Aug 3 '15 at 3:47
  • 1
    The statutory definition of knife "does not include a hunting or fishing knife carried for sports use". If you're carrying a 6 inch filet knife in your overcoat pocket at 3am in downtown Denver, it will be pretty hard to argue that it's "for sports use". Dec 28 '20 at 16:50

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