page_title: Los Peñasquitos Lagoon
section_title: Tick diseases
hierarchical_section_title: Los Peñasquitos Lagoon / Dangers / Tick diseases
caption_attribution_description: English: ticks caution sign at entrance to Del Mar / Carmel Valley Road trail at Los Penasquitos Lagoon
context_page_description: Los Peñasquitos Marsh Natural Preserve and Lagoon is a coastal marsh in San Diego County, California, United States situated at the northern edge of the City of San Diego, forming the natural border with Del Mar, California. The lagoon, previously called The Soledad Lagoon, divides a colony of the endangered Pinus torreyana on a narrow coastal strip. The name "Los Peñasquitos" is Spanish for "The Little Cliffs".
context_section_description: Deer are found in the marsh area, such as along closed Sorrento Valley Road, and often carry ticks that are left behind on vegetation that can brush against hikers, whereupon the ticks are often inadvertently transferred to hikers. Ticks can carry Lyme disease or Tularemia (rabbit fever). Lyme disease, if left untreated, can cause heart and brain disorders, including paraplegia in severe cases, and Tularemia can lead to incapacitating fever and in rare cases death. The canyon on the west side of Interstate 5 between Genesee Avenue and Sorrento Valley Road is particularly abundant with ticks, and a sign on the Del Mar trail near Carmel Valley Road warns hikers that ticks are found along that trail. Fortunately, Lyme disease happens to be "quite rare" in San Diego County, unlike most other counties in California, and Lyme disease is usually treatable, especially if detected early.
caption: Ticks caution sign on Del Mar trail
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