I've had 3 rides in the snow in the past two weeks, crazy!
The first was at night, and there was just too much snow. We just went up horse trail and back down after finding that there were nearly 6" of snow at the top.
Then, last week, I rode a ride with blue sky and sun, and just a sprinkling of snow - about an inch. It was phenomenal - one of the prettiest days of riding I've had in months.
Today I set out in the rain with gray clouds, not quite as exciting as the sunny day. But as soon as I started climbing up the hills in the forest the snow started collecting fast. I ended up riding through about 3" of snow.
I think 3" is about the limit of snow I'll ride in. Coming down it was OK, but going up was tough going because I spun the tires some. Plus, the snow really started to build up in the gears and in the rear triangle.
I would have never guessed that I'd have 3 days of riding in the snow in March!