According to this web site, GMR will be closed from 4:00 PM on 07/03 to 10:00 AM on 07/05.
https://dpw.lacounty.gov/roadclosures/
So, 07/04 it is! The forecast is for cold-ish weather - mid 70s for a high, thus there will be no heat to beat, thus there is no way in hell I'll start earlier than 8:00 AM.
Signor Calamari, you still in? And are you bringing the hound of Baskerville with you?