Invasive plants litter the sides of bike trails and the Puncturevine can even give you a flat tire. Picked up in one zone, the seeds are then deposited into a new area via your bike tires. Be sure to wash your bike when travelling between different areas and look out for tire brushes at the trail head kiosks at each parking lot. Use the brush before and after each ride to make sure you aren’t rolling dirty with bits of these obnoxious inavsive species.