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Hike Towsley and Wiley canyons in the spacious new Santa Clarita Woodlands park, north of the San Fernando Valley.

The Santa Clarita Woodlands Park, north of the arid San Fernando Valley and just west of Santa Clarita's dry hills and valleys, encompasses a surprising assortment of strange geologic features and several surprisingly lush canyons. For 120 years, the Chevron (formerly Standard Oil) Company owned this land, using it for oil production and grazing. In 1995, over 3000 acres of this land was transferred into the public domain. With subsequent additions, the park now includes about 4000 acres.

The 4.8-mile loop through Towsley and Wiley Canyons described here highlights several of the natural features of the new park. You'll visit an ever-changing array of habitats: riparian woodland, oak and walnut woodlands, coastal sage scrub, chaparral, and grassland.

From Interstate 5 north of L.A., exit at Calgrove Boulevard, turn west to reach the Old Road, and drive 0.2 mile south to the entrance road for Towsley Canyon/Ed Davis Park. Drive 0.6 mile west on the graded entrance road to reach the picnic area and nature center that constitutes Ed Davis Park. Park your car here and return (on foot or mountain bike) to the graded road, which continues going up the wide floodplain of Towsley Canyon. Notice the foamy, beige water flowing in the canyon's creek, the faint sulfurous smell, and gobs of tar in places. Well before any oil was extracted for commercial purposes here, the Tataviam Indians of the area used naturally occurring asphalt for medicinal applications and to seal their basketry.

The scenery improves as you reach, at 0.9 mile, the portals of the Narrows, a slotlike cleft worn through layers of sandstone and conglomerate tilted nearly vertical. The Santa Susana Mountains were built through geologic uplift along thrust faults -- a process demonstrated during the 1994 Northridge quake -- an event that caused the Santa Susanas to rise a foot or more. With all the compression going on, both underground and at the surface, it is not surprising to see a variety of folds in the rocks exposed here.

After a brief passage through the Narrows, there's a split in the road. Stay left. After another 200 yards, stay left again, and begin climbing the canyon slope to the left on what is called the Towsley View Loop Trail. It quickly evolves into a narrow, or single-track, trail (easy to negotiate on foot, tougher on a mountain bike) that steadily ascends on switchbacks through sage scrub and later through some gorgeous, almost pure stands of California walnut. Higher still, the tree canopy thins, with scattered oaks and pungent bay laurel clinging to the hillsides. There you catch sight of the hills and valleys of Santa Clarita to the north and east, which are increasingly being overrun with cookie-cutter subdivisions.

After reaching a high point of 2450 feet, the trail begins to pitch downward, executing a circuitous and sometimes steep descent down drier slopes into the shady depths of Wiley Canyon. Joining a dirt road there (3.4 miles), you turn left and head north, making your easy way down-canyon. At 4.1 miles, look carefully for your next turn, on the Canyon View Loop Trail, which rises to the left. A final, crooked 0.7-mile traverse on this trail takes you over a summit and back down to Ed Davis Park, your starting point.

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The Santa Clarita Woodlands Park, north of the arid San Fernando Valley and just west of Santa Clarita's dry hills and valleys, encompasses a surprising assortment of strange geologic features and several surprisingly lush canyons. For 120 years, the Chevron (formerly Standard Oil) Company owned this land, using it for oil production and grazing. In 1995, over 3000 acres of this land was transferred into the public domain. With subsequent additions, the park now includes about 4000 acres.

The 4.8-mile loop through Towsley and Wiley Canyons described here highlights several of the natural features of the new park. You'll visit an ever-changing array of habitats: riparian woodland, oak and walnut woodlands, coastal sage scrub, chaparral, and grassland.

From Interstate 5 north of L.A., exit at Calgrove Boulevard, turn west to reach the Old Road, and drive 0.2 mile south to the entrance road for Towsley Canyon/Ed Davis Park. Drive 0.6 mile west on the graded entrance road to reach the picnic area and nature center that constitutes Ed Davis Park. Park your car here and return (on foot or mountain bike) to the graded road, which continues going up the wide floodplain of Towsley Canyon. Notice the foamy, beige water flowing in the canyon's creek, the faint sulfurous smell, and gobs of tar in places. Well before any oil was extracted for commercial purposes here, the Tataviam Indians of the area used naturally occurring asphalt for medicinal applications and to seal their basketry.

The scenery improves as you reach, at 0.9 mile, the portals of the Narrows, a slotlike cleft worn through layers of sandstone and conglomerate tilted nearly vertical. The Santa Susana Mountains were built through geologic uplift along thrust faults -- a process demonstrated during the 1994 Northridge quake -- an event that caused the Santa Susanas to rise a foot or more. With all the compression going on, both underground and at the surface, it is not surprising to see a variety of folds in the rocks exposed here.

After a brief passage through the Narrows, there's a split in the road. Stay left. After another 200 yards, stay left again, and begin climbing the canyon slope to the left on what is called the Towsley View Loop Trail. It quickly evolves into a narrow, or single-track, trail (easy to negotiate on foot, tougher on a mountain bike) that steadily ascends on switchbacks through sage scrub and later through some gorgeous, almost pure stands of California walnut. Higher still, the tree canopy thins, with scattered oaks and pungent bay laurel clinging to the hillsides. There you catch sight of the hills and valleys of Santa Clarita to the north and east, which are increasingly being overrun with cookie-cutter subdivisions.

After reaching a high point of 2450 feet, the trail begins to pitch downward, executing a circuitous and sometimes steep descent down drier slopes into the shady depths of Wiley Canyon. Joining a dirt road there (3.4 miles), you turn left and head north, making your easy way down-canyon. At 4.1 miles, look carefully for your next turn, on the Canyon View Loop Trail, which rises to the left. A final, crooked 0.7-mile traverse on this trail takes you over a summit and back down to Ed Davis Park, your starting point.

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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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