Marin County Parks & Open Space made this announcement on Wednesday, September 1st regarding the Corte Madera Creek multi-use path:

The Corte Madera Creek Multiuse Path will be closed from September 7, 2010 to December 15, 2010 for work on the Kentfield Force Main Project by Ross Valley Sanitary District. To find alternate routes, please view the detour map.

The work will close a 0.8 mile segment of the path between Stadium Avenue and Bon Air Road in Kentfield.  The detour map is provided below (click image for larger version).