UPDATE – The march has been moved up an hour so it will now start at 1 p.m. at The Rotunda near 40th and Walnut. The other stops are moved up an hour as well.

Community members and activists are marching from the Schuylkill to the Delaware on Saturday to draw attention to the effects of upstate natural gas extraction on the Delaware River watershed.

The march will begin at noon at The Rotunda near 40th and Walnut and proceed first to Love Park and then to the Penn Treaty Park where the annual Shadfest will be underway.

The groups River to River and Protecting Our Waters are sponsoring the march, which will converge on Love Park at 2 p.m. before heading east and then north on Third Street to Penn Treaty Park and the Shadfest.

The documentary film Gasland details natural gas extraction and the process known as “fracking” that entails forcing toxic chemicals into shale formations to force gas to the surface. Gasland is playing as part of a fundraiser for West Philly’s Mariposa Food Co-op on Wednesday.

The rain date is the next day,  Sunday, April 24.