First, check to see that the trail you've chosen is open for the use you have in mind. Make sure it is dry and that you stay on it. As a rule of thumb in the spring, pick a trail with solid snowpack or one that is completely dry of snowmelt and spring runoff. Mountain biking, four-wheeling and even hiking on wet trails causes damage that is nearly irreparable. This is true especially in higher elevations.
Nature can bite back.
Getting hypothermia is a major concern in the spring. Ideal conditions for hypothermia is 30 to 40 degrees Fahrenheit and wet. And you should have the proper footwear so you can hike through puddles. Walking around a puddle widens the trail, causes erosion and impacts vegetation. If you're planning a camping trip this spring, try to camp on a resilient surface such as rock, sand or dry grass at least 200 feet away from a water source.