March is really early but I would cross the Sierra on Hwy 4. If the snow is gone, it has the most parallel dirt options from Murphys to Bear Valley. Then 4 narrows to 1 1/2 lanes and is the most fun ride over the top. 108 has the best views but much more highway.
Going over 4, then thru Topaz then north of Mt Pat to Walker East Fork down to Fletcher, over Luck Boy to Hawthorn.
All that stuff south/east of Carson City is ok but nothing worth going out of your way to ride.