Today was to be a back-up day in case nothing happened at Tehachapi yesterday. As it turned out, today is Monday and Monday is window day - where the Union Pacific & BNSF cease operations so they can carry out track maintenance.
Between 7:30 am and 4:30 pm we saw 3 trains and didn't drive any further than Monolith, 16 miles away - and that's all I'll say about that.
Thankfully I bumped into a UP signal maintainer early on and he was quite happy to power up his laptop and show me a graphical interface of the rail network and where all the trains were - it was looking pretty sad. Armed with that information we decided to head back to the motel and just chill.
By 5:30 pm it was all on again but the light was fading fast. Last night at Mojave. Wonderful place.