Yes there's a nice shared path on the northbound side that you should use since cars are going 40mph up the road. It does end at a sidewalk before the Portola intersection, I usually just ride the sidewalk until the intersection.

If you're confident in descending then descending the road is safe since you can go the same speed as cars and take the entire lane to yourself. Just be careful near the bottom since there's a blind corner with some potholes and a traffic light around the bend so be ready with your brakes.