The 4.4 mile Palo Comado Canyon Trail runs from near the Cheeseboro Canyon trailhead to the China Flat trailhead in the Simi Hills, about a 1,200 foot elevation gain. But you don't have to hike the whole trail to enjoy it. One nice entry point to the trail is on Doubletree Road in Oak Park, most easily accessed via Sunnycrest Drive off of Kanan.
Today was a perfect day for a hike. With temperatures in the low 70s and a cool spring breeze in the air, not to mention some springtime colors on the hills thanks to some recent, albeit brief, rainfall.
More on Cheeseboro/Palo Comado Canyon, part of the Santa Monica Mountains National Recreational Area, at THIS LINK.