Wildflowers bloom in spring, after rains. In coastal parks like Marin Headlands and Point Reyes, wildflowers continue to bloom into summer as well. Below are listed parks where a large variety of wildflowers are found. See the photo section of individual hikes for flower pictures.
Gray Whale Cove Beach
The number of distinct wildflowers along the Gray Whale Cove Trail is probably the highest among bay area trais. See photos in the link below.
A pleasant walk from Montara Beach to Gray Whale Cove Beach with excellent views of the Pacific. The hike includes two beach walks which lie to the west of Highway 1. The rest of the hike is in hills on the east of Highway 1. The views of the coastline are pretty good all along.
Wildflowers are found in Point Reyes along several trails. The hike to Tomales Point, the northernmost tip of Point Reyes goes through several sections where wildflowers abound. Two other trails with plenty of wildflowers, but not as many as Tomales Point Trail, are Coastal Trail to Alamere Falls and the trails near Chimney Rock.
A pleasant hike over green rolling hills and through three lakes: Diamond Lake, Bear Hide Lake and Dinosaur Lake. Plenty of wildflowers in spring. Along the eastern segments of the overall route, there are good views of San Luis Reservoir in the distance.