1.2 hr
From the south, this would be a tough climb up, but most ride up Chivo Canyon Trail, which is much easier, and down Marr Ranch Trail (as mapped). From the top of the ridge, the climb is all worthwhile for the pretty views of Simi Valley and the steep descent that follows. For a longer loop option, you can continue up Las Llajas Canyon Road.
View of Simi Hills Golf Course