The super-hot weather is over. It's hiking time again. Of course it was hiking time during the super-hot weather if you got up at 4:30 a.m., but you were not me if you did that.
I've never hiked the Altadena Crest Trail from one end to the other all at once. I've done different parts at different times. The trail is long enough that to do that at my pace I'd have to take provisions (lunch, dinner, and probably breakfast), and someone would have to drop me off at one end and pick me up at the other.) The trail's got exposed parts, rocky parts, precarious parts and disputed parts.
All of its parts are worth a trek. But you don't have to do them all at once.