Run the Mt. Diablo Foothill Loop

Continue by car down Castle Rock Road until it dead ends at the beginning of the trail. Parking is usually easy to find. If full, there is another overflow lot about 500 ft back the way you came in.

You'll walk a good half mile down the trail before getting the main gate. As you're walking, you'll see a swimming pool, baseball diamond, volleyball courts, basketball courts, restrooms and picnic tables. Begin the 10k at the gate just past the picnic tables.

You will travel down Stage Rd. about 1.5 miles until you see Sunset Trail on your left. Keep an eye out because it's easy to run past. Make a sharp left and you'll find yourself on single track trail winding up through a narrow valley.

Once at the top of the single track, take a left and descend into another valley. Conserve your energy because a climb is coming up! Rest on the downhill immediately after and you'll find yourself in another valley.

You should be on Little Pine Creek Rd. as you ascend the final and largest ascent of the run. Stay to the left as the trail also veers off to the right. At the top, you'll begin your final descent back to Stage Rd. Catch Burma Road down to the right to start looping back down.

Once back to Stage Road, you'll need to turn left for about 0.25 miles before making a U-turn and heading back down Stage Road to the starting point.

Congratulations on crushing a challenging 10k!