From the Russell Road trailhead you will head (left) down the pavement along Russell Road till the road forks. Take the left fork and follow it until you hit a green gate. Keep going and look for some singletrack on the left hand side. This is Manzanita trail, a fun little rocky/ rooted run though manzanita. There are some fun sections here, stay on the main trail all the way until you hit Stagecoach Road.
Photo: Dan'ger near the end of Manzanita in the Springtime