The answer is probably a little bit of both. Pine pollen is a large particle, and fails to travel long distances, and has a waxy coating on it's surface. This makes pine pollen a minor allergy trigger for most people, although some people do experience significant allergic symptoms. Other tree pollens that aren't as visible, such as birch, cedar, oak and sycamore, happen to be in the air at the same time as the colorful pine pollen.
Are you allergic to pine pollen? Only an allergist can tell you for sure. Isn't it about time you found out what you're allergic to? Find an allergist in your area. If you're in the Reno-Tahoe area, Dr. Jeffrey Nugent is a respected allergist serving the area.