I will only attempt to describe trails that I have personally done. These trails offer only a sampling of what these areas have to offer - there may be other trails that are even more spectacular. You should always check locally for recommendations to fit your specific interests. A legacy of William and Elizabeth Kent, who donated the land to the Federal Government in 1908 to protect the canyon from a proposed dam and logging, the park is a remanent of the vast redwood forest that once covered much of coastal California. This is an extreamly popular park and given its proximity to San Francisco is always crowded.
Parking can be difficult on weekends and holidays.
Pick up a trail map and nature guide at the visitor center. Due to the crowds and the many interesting exibits this is an area for walking, not running. No pets or bikes are permitted in the park. The Main Trail begins at the visitor center and follows Redwood Creek on both sides of the creek for .5 miles to Cathedral Grove. Continue past Cathedral grove another .5 miles to 4th bridge.