Running through November 19, 2026, the interactive trail features 11 footprint-shaped installations at prominent landmarks across the city. By scanning a QR code at each stop, visitors can hear the stories of these incredible changemakers in English or Spanish.
If you have already explored the broader overview in our guide to discovering the Las Huellas audio trail, or read through The Arts & Culture Guide to Philly's New 'Las Huellas' Audio Trail, it is time to shift your focus to the trailblazers who fought for justice, science, and community empowerment. Here are the civic and environmental leaders you will meet along the trail.
1. Advancing Housing and Justice at Dilworth Park
The Changemaker: Judge Nelson Díaz
Location: Dilworth Park, 1 S. 15th Street
Situated right in the shadow of City Hall, this footprint honors a legal giant who fundamentally reshaped the landscape of American housing. Judge Nelson Díaz was a pioneering force in the courtroom and beyond. He authored the famous Díaz opinion, a landmark legal perspective that played a crucial role in reshaping federal housing policy and advancing mixed-income communities across the nation. His installation serves as a powerful reminder of the Hispanic community's role in fighting for equitable living standards and civil rights from the very center of Philadelphia's municipal government.
2. Global Conservation at The Franklin Institute
The Changemaker: Dr. Carlos Martínez Rivera
Location: The Franklin Institute, 222 N. 20th Street
Philadelphia's scientific community has a global reach, and Dr. Carlos Martínez Rivera exemplifies this impact. Located outside the iconic Franklin Institute, his footprint highlights his vital work in environmental conservation. Dr. Martínez Rivera developed a critical conservation safety net designed specifically to protect a highly vulnerable Caribbean frog species from the brink of extinction. His inclusion on the trail ensures that the massive contributions of Latino scientists to global ecology and biodiversity are celebrated in one of the city's most heavily visited museum districts.
3. Grassroots Community Building at Las Parcelas
The Changemakers: Iris Brown and Tomasita Romero (Grupo Motivos)
Location: Las Parcelas, 2248 N. Palethorp Street
Sometimes the most profound civic changes do not happen in courtrooms or laboratories, but in the vacant lots of our own neighborhoods. In the early 1980s, Iris Brown and Tomasita Romero, alongside the organization Grupo Motivos, took action to reclaim their community. They united Puerto Rican women to transform neglected urban spaces into vibrant, thriving community gardens and gathering areas.
Located in the heart of Kensington, the Las Parcelas footprint honors their tireless grassroots organizing. They created safe, beautiful spaces where children could play and neighbors could connect, proving that localized civic action can literally bring a neighborhood back to life.
