Cuyamaca Peak, Mountain peak in San Diego County, California, US

Cuyamaca Peak is a mountain summit in San Diego County that rises to 6,512 feet as the second highest point in the region. From the top, visitors can see across vast distances toward the Pacific Ocean on clear days.

The mountain experienced a major fire in 2003 that destroyed much of its forest cover and transformed the landscape. Following this event, various pine species and firs began to regrow gradually across the slopes.

The sources give no Kumeyaay etymology for the name, so its origin should not be asserted. What visitors can observe is the mountain's effect on weather: its elevation forces Pacific moisture to condense, giving 20–32 inches (51–81 cm) of precipitation a year, 70% of it in fall and winter storms. Hoar frost is common at the highest elevations, and snow falls in winter above 5,000 feet.

The hike to the summit starts from Paso Picacho Campground and follows a moderately steep route. Conditions change with the seasons, so visitors should prepare for variable weather and terrain that shifts throughout the year.

The Cedar Fire began about 6.5 miles northeast of the peak in October 2003, when a lost hunter lit a signal fire. New seedlings of white fir, sugar pine, Coulter pine, Jeffrey pine and incense cedar appeared within a year, helped by phosphate-rich Phos-Chek aerial fire retardant dropped during the blaze, and were thriving as saplings by 2007.