Marin Headlands Loop SAU003, 9.5 miles, 1118.feet of climbing GO TOTAL TURN ROAD NAME START AT EAST RD. 0.0 CONZELMAN RD. 0.9 0.9 X ALEXANDER ST. 0.0 0.9 S CONZELMAN RD. 4.2 5.1 R BUNKER RD. 2.0 7.1 X TUNNEL 0.5 7.6 X TUNNEL 0.2 7.8 L ALEXANDER ST. 0.7 8.5 R EAST RD. 1.0 9.5 END CONZELMAN RD. R=Right, L=Left, X=Cross, U=Uturn, S=straight