Sign Hill Park is South San Francisco’s last undeveloped refuge
and the home of two endangered butterflies, the mission blue
butterfly and the callippe silverspot butterfly, as well as a
variety of rare wildflowers. For many years, the park suffered
from habitat degradation, reduced funding, and a lack of public
interest.
Efforts to reverse this decades-long trend took off in 2018 when
the city’s Parks and Recreation Department staff applied for and
received a Measure K grant from San Mateo County, which awarded
$75,600 to the city. This critical ecosystem is now thriving, and
public engagement is strong thanks to an ongoing restoration
program.