Had you spent a lot of time there prior to the race?
some years ago GOALS did a Cradle race that started from the museum. we scootered into philly. biked the river trail, foot O at valley forge, paddled the schuykill?, visited the zoo.
I got lost getting to the Wiss and ended up going against traffic on the 4 lane road south of the park. it was dark and did not enjoy the riding much. much better in daylight.
Oh shit! Yeah, that's the road we told everyone to avoid yesterday, in order not to die. That would have been really hairy.
I think that race was 2006 or '07. They did another 24-hour in/around Philly in 2010 -- started in the city, a little bit in Wiss, then out to Evansburg and Valley Forge before paddling the Schuylkill back to Belmont.