The Seaborg - Briones Crest - Crescent Ridge trail loop is a nice way to see Briones Regional Park. It passes meadows, a creek, countless oak trees, and spectacular views on several sides. Best of all, you can finish the hike in just two hours (depending on your hiking speed; allow more time if searching for geocaches). The eastern entrance is the best trailhead (near GC2GVKM), but it can also be accessed from the Springhill Road trailhead (near GCJT66).