Im originally a Minnesota Mink Trapper I used footholds and 120 Conibears using drain tiles. Often late season I used conibear trail sets tunnels in snow tall grass or cattails.
Now living in Idaho I just started marten trapping,, generalizing my mink methods into a marten boxes.
Boxes work keep both ends open and set in or parrallel to travelways


Long ago trapping friend who likely had the biggest mink catches for years in South Dakota.
Short version he took national grassland water trough redwood stays. Nailed 3 of the 30 inch stays together creating a 5x5x 30 inch, U shaped tunnel. with a trap inside each end. Said he wasn't a mink trapper because that was all he knew

My dad had often used 6 and 8" clay/concrete tiles basically as a tunnel or pocket in water,on dryland or on top of the ice.



A view through the box seems important for mink and only use 120's

Sounds good I will have to find some 120s. I only have 110s and 160s currently. I've got about 15 110 sets out right now. Mostly all cubby and tunnel sets, 2 boxes though. 110 just not have enough power?

Did you catch those mink while you were in Alaska?

I’ve found I like to drill 2 holes threw the top and bottom in line with the trap so I can use a small stick down threw the top , in between the jaws then down into the bottom on my mink boxes. It holds the trap in place but also necks down the opening so they have to go through the trigger more centered. They have a way of sneaking around trigger wires . I made them so the sticks would set right agains the spring eyes on the 120s . Didn’t make the opening too much smaller but I did like the results .

Yes Alaska

I used wire mesh so the mink can see through them and the air pushes all the good smells. What did you bait with? Was using sardines, salmon, and crawfish oil. I also made a couple out of drain tile, so we will see how that goes.

I mainly used large herring, but also salmon heads and even beaver meat.
And I will again stress using wood pans. Other than the occasional blind set, I haven't had great luck with conibears type traps hoping the mink would go through and trip the trap.

I will have to make some. Any ideas or dimensions and how to attach? Also, could I take a spring off of some older 110s and throw it on a good 110 and have a 120?