For the most part, we followed Sventre's GPS route for this hike, starting from the SR88. To get to Black Glass Canyon, we started from Willow Springs Canyon and went Southwest, up into the canyon. Then, when we rejoined with the nameless canyon to the East, rather than head North back to Willow Springs Canyon, we headed South (up the wash). Then we cut East over the yellow rock ridge, back to the road along Willow Springs Canyon.
The hike into the mouth of Black Glass Canyon was probably my favorite part. After getting into the canyon I was surprised to find someone else in the canyon, hiking around the cliffs opposite from the arch. We met him later and it turns out he spends a lot of time out here, looking for more arches.
The climb to the arch was fun. There was a beehive very close to the arch, but I didn't see too many bees.