Volunteer citizen science teams hike segments of the urban San Diego River to collect data about trash, homeless encampments, and invasive plants. This data is collected using a data mapping app called Mappler.

RiverBlitz takes place twice annually, allowing for year-over-year comparisons of point-in-time data.

On-going surveys and data mapping efforts supplement the RiverBlitz program, allowing the San Diego River Park Foundation to initiate real-time responses to trash and invasive plant species.