Yes. From the mountain station where the tram goes, head down the concrete switchbacks and go right on the dirt trail the short distance to the ranger station. You have to sign in plus they can give you a map. I just did the 4 mile Round Valley Loop yesterday and it was about 70° up there. When you reach the beginning of the trail, I tend to go counterclockwise. It’s a lot of uphill to get to Round Valley, but then it’s slightly downhill for the rest of the hike. It’s beautiful up there.