A wonderful self-supported birthday adventure - Rachael's first time ever hitting 20 miles!
We followed the exact GPX of the current male (overall) FKT, other than two very slight workarounds getting out of BUR and into LAX, both because of construction reasons / fences blocking the normal pedestrian paths. We also made sure to tag a terminal to start and end the route (probably adds < 30 seconds) which we felt was nice style, and we felt Terminal2Terminal was a cute nickname playing off R2R for this unusual route across the city! I'd encourage it for future overall attempts! Otherwise, the route is quite straightforward and requires shockingly few turns to make it all the way across the valley and through the city.
We took advantage of the self-supported style to pick up a Burger King breakfast croissant (plus water refills), a full-sugar Monster at a gas station (the best part of the day), and a venti mocha frappuccino at Starbucks (plus final water refills). Otherwise, I carried water and some basic snacks. It was a lovely time out and we didn't run into any issues!