Happened to catch this post-event report in the RSN sidebar:
The road was closed for the 18th annual Napa Valley Inline Marathon
and Half Marathon so skaters, some Bay Area locals and visitors
from France, Germany, Australia and other countries, could have
free reign of the course.
“These people live for these types of events, where you get a
closed, smooth road and you can skate distances, not just like in a
roller rink where you go in circles,” said organizer David Miles,
55, of San Francisco.