Bicycling Tours Of Our Service Area
Go With The Flow - Section One: Pleasant Hill and Martinez


In partnership with Bike Concord, Central San will guide participants along a portion of our wastewater infrastructure following the Iron Horse Trail. Discover what’s happening beneath your wheels!


Sunday September 29th from 9:00am – Noon

Our route begins at Pleasant Hill BART Station. We will travel north to the end of the Iron Horse Trail in Martinez before turning around and returning to Pleasant Hill BART. 

The halfway point is a great location to get picked-up if you only want to ride the route one direction. You can view the full Bike Tour Route Here. Please see our additional information below.

For questions, please contact Ben Lavender at or (925) 335-7723.

Event Information

8:30 am: (Optional) Arrive early and get a bike check-up with the Bike Concord staff mechanic.

9:00 am: Participant check-in and tour logistics.

9:20 am: Roll out and tour Central San’s wastewater infrastructure along the Iron Horse Trail. We will ride our bicycles approximately 12 miles through paved local trails – with several stops along the way. View the Full Bike Route Here.

10:45 am: Our route will head to the end of the Iron Horse Trail in Martinez before we turn around and return to Pleasant Hill BART. If you only want to ride the route one-way, this is a great location to get picked-up.

12:00 pm: Arrive back at Pleasant Hill BART station to end our tour.

Participant Information

Tour Attendees are responsible for providing their own working bicycle and helmet. Participants without a helmet will not be allowed to attend the tour. 

Participants under the age of 18 must be accompanied by an adult. All participants should wear comfortable clothing and shoes for biking. Water and extra layers are encouraged as weather can be unpredictable.

Our Tour will involve biking on paved local trails for approximately 12 miles, including several stops. The riding is on mostly flat terrain.

Our Guides include several bike chaperones who can assist with basic bicycle skills, safety, and minor mechanical issues while out on the trail. Bike Concord staff will be onsite to provide a bike check-up prior to the event.

Tour Information

Please Arrive at least 15 minutes prior to the tour start time to get checked in. Participants who arrive late may miss the tour departure.

Participants will be provided with listening devices while on the tour. This will allow us to communicate while riding down the trail.

Central San reserves the right to cancel tours. If a tour is canceled, we will notify you at least 24 hours prior to the scheduled tour. 

For Questions and additional information, please contact Ben Lavender at or (925) 335-7723.

Background Information

For 21 miles, the Iron Horse Trail pedestrian and bicycling path follows one of Central San’s sewer lines—nearly the entirety of the flow from the southeastern-most corner of our service area in San Ramon all the way to our treatment plant in Martinez.

This path allows us to take our customers on a bicycling tour of a portion of our sewer service area, highlighting pieces of wastewater infrastructure along the way. This bicycling tour is built upon our Go With The Flow Map, designed to help our customers see (and sometimes hear) the flow of wastewater that follows the Iron Horse Trail throughout Contra Costa County. 

You Can Check Out The Full Map HereGO WITH THE FLOW

In addition to our tour, you can use the interactive map to view prominent access covers, convenient entry points to the trail, and information about what’s happening just below ground! By following the map, you can walk, bike, or run the path of wastewater from your home, school, office, all the way to our treatment plant!