My advice is remember you're not on the bike path. My first race there was a guy on my left who wanted to move up and there was just enough room between the guy in front him (slightly to his right) and the yellow line. So what does he do? "On your left!". Guy in front looks back and says "nope" and blocked him. Guy behind was pissed. I'm proud to say I held my line even with the facepalm.