I live in Glendora, so GMR and Bonelli are my regular rides. The base of GMR is about 6 miles from Bonelli, so very doable to hit both in one day. Coming down Baldy you can get some pretty serious speed. I've been in the mid 50's and that's fast enough for me, I'm sure if you're geared right and really wanted to you could get very close to 60. Be careful! If you remember let me know when you put this ride together, I could meet you along the way.