Army surplus
Cold Steel Russian special forces shovel
SOG shovel

another option,
go to hardware store, find the best shovel there, modify it for your vehicle, cut shorten it, affix handle on the new shortened timber, or find a small vehicle shove there. For my extended comprehensive list, I have military surplus entrenching shovel, shorter solid spade, long handled spade.

Chinese army shovel. Not sure where to buy it, found one us site selling them for $269.00 Each. !!
Ah, bushcraft Canada for $119.00

Must see video on YouTube

Karnit

Forest City surplus, $16, spike and spade, CDN Mil surplus, aka, US or Brit surplus pawn off unto CDN Mil. 👿

Want to buy a new, used sub? 😀

Sorry forgot to say "no warranty". 😀

i bought one from a military store in Red Deer,it locks in a ninety degree angle also has a pick on the other side,little heavy but last you forever,comes with sheath.

Check out the Glock entrenching tool...decent price and Glock quality!

I saw the Glock one and was hoping for a review. Any other suggestions or reviews? Am not quite willing to pay $100+ for a Chinese Surplus though.

I have this Gerber E-Tool with pick.
http://www.amazon.ca/Gerber-22-01945-Entrenching-Serrated-Blade/dp/B001PTGOK0

One side I sharpened and use it to split wood at river fires in a pinch.
I thought the plastic parts might get damaged, but it has held up great, though it is pretty heavy to lug around in a BOB.

I picked up one of these for the car, for possible winter dig out. For that it is good, for digging ground, not so. The serrated edge, is useless unless you put an edge to it first, and since it is not a hard metal, it will dull fast if trying to saw with it. Yours may be different, so I'd advise you to try if first before you really need it.

Ranger,

What kind was it?

Having been stuck in the snow a few times over the years I found you need a good strong blade (to pry and chop)and a long handle. Go to the feed store and get a square blade steel dirt shovel with maybe 8" wide blade and straight handle. Cut the handle as long as you can and still fit in your storage spot. If it's not at least 3ft long, find a better spot. Put an edge on the blade and coat with linseed oil or WD-40. Better for the tough stuff if you slightly round the blade before sharpening. A flatter angle handle to blade (more straight than bent) is better as you'll probably be trying to reach under the car and scoop the packed stuff out from under the center.
An E-tool with a 12" handle is OK for scooping out a little hole in the dirt but useless for reaching under your vehicle.
A saw is almost a must-have for cutting boughs for under the tires too.

Perfessor hit the nail on the head with his post. I still have the fire axe I was issued fighting forest fires in the eighties. I use it to cut through and break up the hard snow around the yard, then the square shovel or a snow shovel to move the snow. The axe is handy for branches too and the hoe end can be used for very heavy prying.
A far as a good all-around trenching tool like Helicopilot was asking about, I think a good quality one that was built for military use is the way to go.
I also carry a Stanley claw hammer in my bug out. Hold the hammer head like a top handle and those claws go through ice, frozen dirt, gravel and small roots extremely well. This way it does the work that might bend the trenching tool and then the shovel end of the trencher can move the debris out of the way.
As a plus it is a very effective self-defence tool and the hammer helps assist my hatchet, thick bladed machete and other things.

The toughest thing I had to dig were crab grass tufts. Lee Valley mattock, just the right weight to chop and ergonomic enough to be precise. Dirt, roots rocks, no problem, now I use it for all breaking the soil tasks.