Sign Hill

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Valuable Open Space

In addition to serving as a monument in North San Mateo County, Sign Hill provides a valuable 44.6 acres of open space and almost two miles of hiking trails. In 1996, Sign Hill was placed on the National Register of Historic Places.

Sign Hill also serves as the home of the endangered Mission Blue Butterfly, various species of birds such as egrets, gulls, and terns, and wild irises and poppies.


Map of Sign Hill | Directions to Sign Hill


  • Ridge Trail (0.77 miles) - Along the crest of Sign Hill from Ridgeview Court to Spruce Avenue
  • Seubert Trail (0.36 miles) - From Poplar Avenue entrance up to the Ridge Trail
  • Eucalyptus Loop Trail (0.27 miles) - Off of Seubert Trail along base of Sign Hill
  • Iris Hill Trail (0.27 miles) - Off of Poplar Avenue up to the Ridge Trail
  • Letters Trail (0.2 miles) - From Poplar Avenue along the base of the letters to the Ridge Trail

Learn About Seubert Trail and Seubert Grove

Seubert Trail and Seubert Grove is named after Alphonse Seubert, who was a long-time resident of South San Francisco and original member of the South San Francisco Beautification Committee. Also known as "Mr. Sign Hill," he was known for his involvement on Sign Hill since the 1960s. It is estimated that Mr. Seubert had single-handedly planted an estimated 5,000 trees on Sign Hill, and was regularly seen going up and down the hill watering and nurturing all of the seedlings he had planted. Additionally, he was instrumental in the development of the trails that are in use today.

In 1991, Mr. Seubert was named a recipient of the National Arbor Day Foundation Lawrence Enersen Award. Recipients of the award are individuals whose life's work exemplifies commitment to tree planting and conservation in community improvement. Mr. Seubert passed away in 2006.

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