Ridge Trail – Lime Kiln ruins loop from Limestone Kilns

If you're looking for a challenging jog with a side of history and expansive views, the Ridge Trail – Lime Kiln ruins loop from Limestone Kilns is definitely worth your time. This difficult 5.6-mile (9.0 km) jogging route packs in 874 feet (266 metres) of climbing, typically taking around 1 hours and 21 minutes to complete. It's a fantastic option for experienced joggers who appreciate varied terrain and a glimpse into California's past, offering a rewarding workout with plenty to see.

What to expect on Ridge Trail – Lime Kiln ruins loop from Limestone Kilns

Expect a dynamic journey through Almaden Quicksilver County Park, where the terrain constantly changes from wide fire roads to narrower singletrack. You'll jog through rolling grassy hills, cool oak woodlands, and open meadows that burst with wildflowers in the spring. The highlight for many are the panoramic vistas of the Santa Clara Valley, the Sierra Azul Mountains, and Mount Umunhum from the exposed ridgelines. Be prepared for significant uphill and downhill sections, some of which can be steep and rocky, making this a good test for confident joggers.

Planning your visit

Access to the Ridge Trail – Lime Kiln ruins loop typically starts from the Limestone Kilns area, where parking is available. Given the park's history, you'll find remnants of mercury mining operations, including old kilns, scattered along the route. During summer, exposed ridgelines can get very hot and parched, so always carry plenty of water, especially if you plan to jog during midday. Spring is an ideal time to visit, offering pleasant temperatures and vibrant wildflowers.

Trail details

• Distance: 5.6 miles (9.0 km)
• Elevation gain: 874 feet (266 metres)
• Difficulty: difficult
• Estimated time: 1 hours and 21 minutes