Walks and trails in kirstenbosch. Here are five great places to explore on foot in the san gabriel valley that aren’t too far afield, yet have plenty of fodder for your sense of adventure. The san gabriel mountains national monument contains spectacular biodiversity, including more than 500 native plants and fungi, and dozens of endangered, threatened, rare or sensitive species including the california condor, nelson’s bighorn sheep, california spotted owl, and the southern california legless lizard. Want to find the best trails in san gabriel mountains national monument for an adventurous hike or a family trip? Alltrails has 240 great trails for hiking, camping, and backpacking and more. Ready for your next hike or bike ride? What are some hiking trails in san gabriel? The eaton canyon natural area, about 11 miles (17 km) from san gabriel, features a scenic hiking trail leading to a waterfall. For a more challenging hike, the san gabriel peak trail, part of the san gabriel mountains, provides panoramic views of. Though the trail travels through an urban environment, adjacent parks and natural features help diversify the landscape.