I just had to try out the duathlon FKT- Not sure how many of these there are. The focus was definitely the run and the bike ride was just an added bit of fun. That being said, it was tiring. The day before the ride, we asked the park service at the entrance booth if they wanted bikes to come through the entry lanes or not. The NPS employee in the booth said since we had a pass, to take the multi-use path around the visitor center instead of going on the road through the booth, so that's what we did. The run and ride were supported- My partner rode with me but did not do the run.
I decided to change from my running gear to cycling because I didn't really care much about those 'wasted' minutes and I'd rather be in my chamois and cycling shoes. It wasn't going to be a fast ride, so it might as well be comfortable. It is mostly all uphill this direction (counter clockwise) and there was a killer headwind. The parking lot at Rainbow Point was madness by the time we arrived, a far cry from how empty it was several hours later.