fremont older is not that fun of a place. it is great for a local quicky but be weary of horses horse poop and radar guns. i would try lexington in los gatos, saratoga gap and long ridge at the top hwy 9, montebello and stevens canyon, they all interconnect, santa theresa at the end of 87, grants ranch on mount hamilton, soquel demonstration forrest in aptos, UCSC at the campus, wilder ranch in santa cruz. all of those places are within about 45 minutes of palo alto depending on traffic. i grew in the bay area and had endless places to ride and loops to do. i hope that helps. if for just the lunch time quicky fremont older is ok afterall thats where i learned to ride 12 yrs ago. for after work the lexington area is fun and their a few fun loops up there. for singletrack hit the saratoga gap area and for not so much fun climbs and fast fireroad descents hit grants. anyway have fun discovering all of those trails.