If you start on the 101, stay to your left whenever you have a choice, until you get to Pasadena. From 101, take 134 East (tend to the left; do not take 101 South to Hollywood, but follow the Burbank, Glendale, and Pasadena signs). The 134 ends and becomes 210 East as you approach Pasadena, so don't be confused by the 210 signs—just follow 210 East.
Five or ten minutes after passing through Glendale, you will see signs "Rose Bowl Next 3 Exits" and then "Pasadena Next 9 Exits". I think Lake Ave. is the 5th Pasadena exit (it is hard to count). You will need to get over to the right. In fact, new lanes come in on the right as you approach Lake, and you will need to move further to the right, several times. After you get off the freeway, move to the right yet again, because you need to turn right onto the actual Lake Ave. at the stoplight.
As you go South on Lake, you will soon come to Colorado, Green, Cordova, and then Del Mar. There are traffic lights at all these intersections. There is a "Good Guys" with a "Tower Records" above it on the left corner just after where you are to turn left onto Del Mar.
Watch out for cars coming out of the parking lot behind Good Guys. There is a traffic light at Mentor; pass that and turn right at your next chance, which is Catalina Ave. There are large numerals near the entrance to our building with the address 439, but they are partially obscured by a tree and not easy to see as you drive by. The entrance is just before the very last driveway on the right, opposite a yellow fire hydrant.
Hill is the next exit after Allen as you go west on 210. (If you wish, or if you miss the Hill exit, you can get off at Lake Ave., turn left, and then follow the directions above.)
After you pass Colorado on Hill, PCC (Pasadena City College) will be on your left. PCC ends at Del Mar, which is where you want to turn right. It is a stoplight.
The street before Catalina is Wilson (a stoplight). No stoplight at Catalina Ave., where you turn left. There are large numerals near the entrance to our building with the address 439, but they are partially obscured by a tree and not easy to see as you drive by. The entrance is just before the very last driveway on the right, opposite a yellow fire hydrant.
California Ave. is a stoplight. There will be a Trader Joes on your right just before (though not at the corner) you are to turn right. You may see a little sign with an arrow saying Huntington Library, or one saying Cal Tech [sic... it should be Caltech].
On California, you will pass Lake Ave., a stoplight with a Wild Oats just before on the right and a Von's Pavillion Place on your left. Catalina is the first street at which you can turn left after that (no stoplight). If you see Wilson Ave. and Caltech, you have gone too far.
There is a stop sign at San Pasqual, and our building entrance is just a few hundred feet further north, on the left. There are large numerals near the entrance to our building with the address 439, though they may not be easy to see as you drive by. The entrance is just after the first driveway on the left, opposite a yellow fire hydrant.
After turning left at the four-way stop, you will pass Los Patos Way and then the bird refuge on your right. There is a stop light at Niños Drive, which is the first right after the bird refuge. (That is the Pacific Ocean on your left.) Give cyclists and pedestrians the right of way at the crosswalk, of course, after you turn. The little street you are to turn right into is Por La Mar Circle, but the kiosk is right there after a hundred feet or so.
If you prefer, pass the stop sign at Por La Mar Circle and park on the right. Then you can walk back and into the El Escorial complex; but you must stop and say hello to the nice man at the kiosk anyway.
Niños Drive is the second stoplight, the first left after the Radisson hotel. Give cyclists and pedestrians the right of way at the crosswalk, of course, after you turn. The little street you are to turn right into is Por La Mar Circle, but the kiosk is right there after a hundred feet or so.
If you prefer, pass the stop sign at Por La Mar Circle and park on the right. Then you can walk back and into the El Escorial complex; but you must stop and say hello to the nice man at the kiosk anyway.