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Sunset Mountain, Anza-Borrego Desert State Park

A bird’s eye view of Borrego Valley and the surrounding desert and mountains from a mountaintop.

View to north into Borrego Valley from the ridge
View to north into Borrego Valley from the ridge

Sunset Mountain takes its name from the last rays of sunshine that enshroud the top with the setting sun. The 3657-foot peak is located south of SR-78 between Pinyon Wash and Harper Canyon. From the top, there are views to the Salton Sea beyond the Borrego Badlands, which make the hike worth the effort. Borrego Valley lies to the north, and the Pinyon Mountains and Whale Peak are to the southwest. The bulk of the Vallecito Mountains stretch out toward Fish Creek.

If hiking in the early part of the year, plan accordingly for short days of sunlight. Carry a light and a jacket if starting the climb any time after 12 noon. Take extra care hiking down, which can be more difficult than hiking up because of the steepness and loose rocks. Trekking poles are recommended. Sunset Mountain can be climbed from various sides, but the route from Pinyon Wash is the easiest.

From the parked vehicle, begin hiking to the east and climb up toward the low point of the broad ridge that lies to the west of the peak. There is no real trail, but one should not be concerned about getting lost. Heading for the saddle and then walking the ridge will avoid the many big boulders that would be encountered if you just went straight up. Keep the summit in view and look back at the trail often for landmarks for the return trip. The main challenge will be finding a way around large rocks, agave, and cacti. After the ridge is ascended, follow it to the summit, where there is a U.S. Geological Survey benchmark and a climbers’ log to record your name. Retrace your path for the return hike.

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A variety of plants can be found on this hike from smoke trees, chuparosa, and desert lavender in the wash to jojoba and ephedra/Mormon tea at the higher elevations. A variety of cacti and agave are found at all elevations. Be particularly cautious of the agave staves and the catclaw acacia. Long pants and a long-sleeve shirt offer some protection.

  • Distance from downtown San Diego: About 88 miles. Allow 1 hour and 50 minutes driving time (Anza-Borrego Desert State Park). From SR-163N, take I-8E, exiting at SR-79N (Descanso turnoff). Turn north on SR-79. Drive 3 miles and turn left, continuing on SR-79 for 20 miles to the junction of SR-79 and SR-78/Banner Rd. Turn right on SR-78 and drive 22.5 miles to the turnoff for Pinyon Wash, 4.1 miles past the junction of SR-78 and SR-3. Drive south 1.6 miles on the Pinyon Wash dirt road to the junction with Nolina Wash. Go left, staying in Pinyon Wash. Drive 1 mile further and park (if concerned about driving in the wash, park at the junction and begin the hike there).
  • Hiking length: 6 miles out and back. Allow 5–7 hours.
  • Difficulty: Strenuous. Elevation gain/loss almost 2000 feet. Trekking poles highly recommended. No clear trail — just a route with many boulders, loose gravel, agave, cacti, and thorny catclaw acacia. No facilities. Carry at least a half-gallon of water.
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View to north into Borrego Valley from the ridge
View to north into Borrego Valley from the ridge

Sunset Mountain takes its name from the last rays of sunshine that enshroud the top with the setting sun. The 3657-foot peak is located south of SR-78 between Pinyon Wash and Harper Canyon. From the top, there are views to the Salton Sea beyond the Borrego Badlands, which make the hike worth the effort. Borrego Valley lies to the north, and the Pinyon Mountains and Whale Peak are to the southwest. The bulk of the Vallecito Mountains stretch out toward Fish Creek.

If hiking in the early part of the year, plan accordingly for short days of sunlight. Carry a light and a jacket if starting the climb any time after 12 noon. Take extra care hiking down, which can be more difficult than hiking up because of the steepness and loose rocks. Trekking poles are recommended. Sunset Mountain can be climbed from various sides, but the route from Pinyon Wash is the easiest.

From the parked vehicle, begin hiking to the east and climb up toward the low point of the broad ridge that lies to the west of the peak. There is no real trail, but one should not be concerned about getting lost. Heading for the saddle and then walking the ridge will avoid the many big boulders that would be encountered if you just went straight up. Keep the summit in view and look back at the trail often for landmarks for the return trip. The main challenge will be finding a way around large rocks, agave, and cacti. After the ridge is ascended, follow it to the summit, where there is a U.S. Geological Survey benchmark and a climbers’ log to record your name. Retrace your path for the return hike.

Sponsored
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A variety of plants can be found on this hike from smoke trees, chuparosa, and desert lavender in the wash to jojoba and ephedra/Mormon tea at the higher elevations. A variety of cacti and agave are found at all elevations. Be particularly cautious of the agave staves and the catclaw acacia. Long pants and a long-sleeve shirt offer some protection.

  • Distance from downtown San Diego: About 88 miles. Allow 1 hour and 50 minutes driving time (Anza-Borrego Desert State Park). From SR-163N, take I-8E, exiting at SR-79N (Descanso turnoff). Turn north on SR-79. Drive 3 miles and turn left, continuing on SR-79 for 20 miles to the junction of SR-79 and SR-78/Banner Rd. Turn right on SR-78 and drive 22.5 miles to the turnoff for Pinyon Wash, 4.1 miles past the junction of SR-78 and SR-3. Drive south 1.6 miles on the Pinyon Wash dirt road to the junction with Nolina Wash. Go left, staying in Pinyon Wash. Drive 1 mile further and park (if concerned about driving in the wash, park at the junction and begin the hike there).
  • Hiking length: 6 miles out and back. Allow 5–7 hours.
  • Difficulty: Strenuous. Elevation gain/loss almost 2000 feet. Trekking poles highly recommended. No clear trail — just a route with many boulders, loose gravel, agave, cacti, and thorny catclaw acacia. No facilities. Carry at least a half-gallon of water.
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4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs
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