Replying to Driving to mammoth

from seattle, this is what mapquest gave me:

Merge onto I-5 S toward PORTLAND. 523.7 miles

5. Merge onto CA-89 via EXIT 736 toward MC CLOUD/LASSEN PARK. 78.2 miles

6. Turn LEFT onto CA-44/FEATHER LAKE RD. Continue to follow CA-44. 45.9 miles

7. Turn LEFT onto CA-36. 10.2 miles

8. CA-36 becomes US-395 S. 89.7 miles

9. Merge onto US-395 S via EXIT 57B toward VIRGINIA CITY/CARSON CITY/SO LAKE TAHOE. 148.2 miles

10. Turn RIGHT onto MAMMOTH SCENIC LOOP. 5.8 miles


Now, does that sound like the best way? or is there another way that's gonna be faster?