A little more information about Sandia Crest- you can also access it by driving the road up to the summit. The road is 13 miles long, there's a ski lift about 7 miles up. I was there in early January, my first visit, and can attest the road is very well sanded and plowed all the way to the top. There are lots of places to park on the shoulder and set out on foot. No telling what it will be like in March, but in January the snowpack was more than waist-deep (yep, I found out on my own
If you do pull off the road, make sure you're pulling off onto asphalt and not a flat deceptive snowdrift (nope, didn't do this, but saw someone who had).
Although this is information primarily for birdwatchers, there's a ton of info at this website:http://www.rosyfinch.com/#FEATURED_BELOW
And, a detailed mile-by-mile guide to the road:http://www.rosyfinch.com/sandia.html#A_GUI..._THE_CREST_ROAD