How bad is road salt for my bike? I took my mountain bike out yesterday in the snow. Did some hills around town, riding through slush and puddles, and all sort of dirt/mush/ice/snow. 

I gave the bike a pretty good wipe-down after the ride, but I have my outside spigots turned off, so I didn't hose it down. 

Should I be worried about potential damage to cogs/rings/chain/etc, or any of the other components on the bike? It's a Specialized Epic, aluminum, full suspension. 

Thanks
For a one-off ride in the salt like that, you should be fine for now if you lube the chain and wipe it down. Give the bike a good washing whenever the weather warms up enough to turn on the outside spigot.

In my experience of riding through road salt (and grit, which is probably just as bad) on a regular basis, the bike tends to need a new chain every spring, and a new cassette and bearing overhauls about every second year or so.