Every spring, common walkways get trampled to mud. The sudden inflow of moisture from snowmelt and spring rains leads to saturated and muddy terrain. This normally doesn't do much more than annoy those who travel the muddy paths, but to the terrain itself, it's destructive.
Spring is a time of growth, but trampled ground leads to dead vegetation and compacted soils. Both inhibit growth and encourage runoff and erosion. This issue is compounded when you add cattle to the mix, and even more so around delicate riparian zones. Spring mud is inevitable, but the damage doesn't have to be. It's an interesting obstacle to architects, farmers and conservationists alike.