Found another possible route.
I could combine the Glendora and Falling Springs routes by heading east to San Antonio Heights, then work my way west.
Glendora/Falling Springs hybrid route - 104miles, 2hours 34min.
If I decide to go this way, I could easily cut the trip shorter by heading to Glendora, at point C, or have the option to head to Falling Springs, at point D, depending on how I'm feeling.
Looks like the sun will set around 7pm, so glare will not be a problem.