I have the Mastercraft Courser Trail 235/75R17 tires. Truck is 2013 FORD F150 2WD SUPERCAB 3.7.Question is are these tires good for winter? If not looking at Sumitomo Encounter AT any suggestion.

 

where do you live so we know what your up against

 

Upstate New York.

 

I take it a 2nd set of winter tires is not an option?

The Sumitomo has the 3-peak rating, the Mastercraft does not. (according to their own websites) So, Mastercraft doesn't think their tire is rated well for winter.

 

i see snow tires all over market place for sale get a set, throw some weight in center of bed and go. tguy at work built a box with 2 x 6" board around his wheel wells in bed, has some bag of concrete he throws in the center of it when it's going to snow and needs to drive in it. Takes him 5 mins to load in few bags to give him couple hundred lbs and works for him, takes it out when no snow "why carry the weight"

 

If you are RWD only, I would suggest dedicated snows as well.

 

I third the dedicated snow tires. If that is not an option, then get a tire with the 3 peak snow rating. And regardless of what tire you run, make sure you have a bit of weight in the bed as close as possible to centered over the axle.
Take a look around facebook marketplace for used tires or used wheels.
You can also look for other sizes as well. Your stock tires are 30.8" tire. other tire sizes close enough to use without issue: 245/70/17, 255/70/17, 265/65/17. Or if you find a cheap set of 18" wheels you could use 265/60/18. These sizes are all between 30.5 and 31" dia. So even if you only buy two of them for the rear its fine.
If you are swapping out all 4 you could bump up to a 265/70/17. They're 2" taller so the speedometer and odometer will be off and as such gas mileage will also be incorrect. BUT that particular size is probably THE most common 17" truck tire size. So it's the easiest to find and in many cases the least expensive as well.

 

I see a lot of good suggestions already, but I wanted to add one more thing: 235/75R17 size is not so common, at least around me, so also check out some alternate sizes. I have a 2014 regular cab, 2WD, 3.7 V6, and I have a second set of wheels and tires with Blizzak 255/70R17 tires. They are a little bigger than stock but work fine.
I also took some boards and built an H shaped thing that sits in notches in the bed and holds sand bags. I think I have 6 or 7 45lb bags in there now. Between the weight and good tires I don't have any issues in snow on roads even with 2WD. Of course it's pretty flat where I live, no hills really. I understand I am likely to get stuck if I get too cocky in deep snow or go off road. 2WD has it's limits but if I use my brain I'm fine. Weight is a cheap thing that really helps.

One more thing I just remembered. Back when the 2011 trucks were introduced, Ford talked about one wheel spin control. I did not see it talked about too much after that. Anyway, if I remember correctly, if you turn off the traction control you sort of have a limited slip type behavior with the brakes holding the wheel that wants to spin. I know it seems counter intuitive, but it seemed to work for people. There was a guy who did a youtube video of this but I can't seem to find it now.

edit: found a thread about one wheel spin control: https://www.f150forum.com/f38/one-wh...153704/index2/

 

Thank you all. Looking for snows now.

 

Colorado here - I've never owned a pair of snow tires. A good set of all terrains are great in snow. I've been running KO2's for years and absolutely love them. Great on dry roads, snow packed roads, pretty decent on ice, great in the mud and dirt. Very quiet and smooth on city streets and highways.

Snow tires are great, but on a heavy truck they just don't last long. I have close to 30k on my current set of KO2's and I still have at least 75% tread left.