Per Sean’s announcement at Wednesday’s ride, here is an article with information on the Marin Open Space district’s intent to crack down on speeding on Fire Roads and trails starting April.
Radar Technology

Speed limit: 15 mph on straights
and 5 mph on blind corners

There are open space areas that are frequented by many of us:

Alto Bowl/ Horse Hill
Baltimore Canyon
Blithedale Summit
Camino Alto area

Watch your speed and don’t poach trails.