Alvin, welcome to ASBCLA! The general information about Mammoth trips are on this website’s Trips->TripsInfo link. I think the January trip is still open, but you should contact the January trip leader Candice Ota () for information.
This website has been renewed recently and I see that not all the links are working, like the map to the pickup points. You are probably closer to the Van Nuys pickup point, on the Woodley Ave curbside outside the Van Nuys Flyaway Bus Terminal.
(I tried to insert the google map link here, but apparently that breaks this forum display, so I took it out. You can search for “woodley ave and saticoy st” on the google map to get the location.)
The bus usually arrives around 7 pm from the South Bay pickup point.
mmmthmtskier, if you are on the January trip, I will probably see you there, but who might you be? S.O...Steve?
-robert