Sag Pond in Monte Bello Open Space Preserve

The Black Mountain via Sag Pond loop offers a diverse jogging experience, taking you through a mix of grasslands, chaparral, and oak woodlands. You'll find yourself on both single-track paths and wider dirt roads, with the landscape constantly shifting. A unique feature is Sag Pond, a natural indentation formed by the San Andreas Fault, which adds a touch of geological wonder to your run.

This moderate 5.1-mile (8.2 km) route involves 800 feet (244 metres) of elevation gain, making it a solid workout that most joggers can complete in around 57 minutes. While the ascent to Black Mountain includes some steep, exposed sections, the varied terrain and rewarding views across the Bay Area make the effort worthwhile. It's a great option for those seeking a balanced challenge.

Located in the Rancho San Antonio Open Space Preserve, this trail is particularly stunning in spring when wildflowers like mariposa lilies and poppies bloom. The route also provides views of the historic Kaiser Permanente limestone quarry. Remember to bring plenty of water, especially during warmer months, as shade can be sparse on some of the climbs.

The Canyon and Stevens Creek Nature Trail Loop offers a fantastic blend of terrain and views for joggers in Monte Bello Open Space Preserve. You'll navigate through oak woodlands, open grasslands, and forested canyons, with the trail winding down into Stevens Creek Canyon before climbing back out. It's a moderate 2.8-mile (4.5 km) route with 436 feet (133 metres) of elevation gain, making it a solid 32-minute effort that feels longer thanks to the varied scenery.

Planning your visit means checking for current conditions, as some adjacent trails are closed for construction until September 2026, though the Stevens Creek Nature Trail is open. Parking can fill up, so an early start is recommended, especially if you want to enjoy the cooler morning air. This loop is a great option for those seeking a quick, challenging jog with rewarding views without committing to an all-day adventure.

What makes this loop particularly interesting is its journey across the San Andreas Fault on the Canyon Trail portion, offering a unique geological perspective. You'll also trace the headwaters of Stevens Creek, which flows all the way to San Francisco Bay. Keep an eye out for local wildlife like western fence lizards in the sunnier spots, adding to the natural appeal of this diverse trail.

The White Oak Trail – Black Mountain loop in Los Trancos Open Space Preserve delivers a diverse and challenging jogging experience. You'll navigate a mix of flowy single track through shaded oak woodlands and open grasslands on the White Oak Trail, before ascending to the exposed Black Mountain plateau. The route offers a dynamic shift in scenery and terrain, rewarding your efforts with sweeping views across Silicon Valley and out to the Pacific Ocean.

Planning your visit to this difficult 7.0 miles (11.3 km) route, which involves 1308 feet (399 metres) of elevation gain and takes about 1 hour and 28 minutes, means considering the best time to go. Parking at Los Trancos Open Space Preserve is available, but arriving early is recommended, particularly on busy days. Always bring ample water, as sections of the trail are exposed, and check for any seasonal trail conditions or permit requirements before you head out.

This area is uniquely shaped by the San Andreas Fault, which runs directly through Los Trancos Open Space Preserve, creating interesting geological features like sag ponds. Beyond the physical challenge, the trail offers a chance to observe diverse ecosystems, from moist, fern-filled woods to dry, open fields, and potentially spot wildlife like deer and hawks. It's a top-rated jogging loop for those seeking both a workout and a connection to the natural and geological history of the Santa Cruz Mountains.