Mount Tamalpais MTB Ride

Going biking around North Bay always poses a dilemma for me, a Mid-Pen inhabitant: is it worth the trip through San Francisco? What is the weather going to be like north of the GG bridge? And no singletrack to speak of, are the fire roads really that interesting?
But the descriptions of "hot rides" on http://www.marinfattire.com/ sounded good, weather forecast for Fairfax was mid-seventies and a friend was interested in riding together, so we decided for a ride up Mt. Tam from Ross via Eldridge, Hoo-Koo-E-Koo and the Old Railroad trails.
The day began by driving to the meeting point through the 19th Ave fog and drizzle (I knew it, what the hell am I doing at this place, only the Scots and Brits may possibly like it here etc etc...), finding Ross Commons with all the GPS-suggested streets being closed for repairs, and continued by us reaching the trailhead just to learn the trail around Phoenix Lake was closed and the shortest alternative was a 10 mile detour on pavement. The other alternative was to sneak through the gates. Guess which one we chose.
The climb up was actually quite scenic, first through some redwoods with small creeks flowing, and then on exposed hillsides of Mt. Tam with views like this:



After some initial steep climbing, the road grade decreased once we hit the Old Railroad trail, which I guess is the advantage of all old railroad beds.

After a short break at the East Peak, we headed down to take the supposedly more technical way down Eldridge Grade. It was definitely rocky and steeper than the way up, with two lines to pick: one with the "death cookies" and the second one on solid but sharp rocks. Well, the loose small rocks definitely make steering above certain speed interesting, but I guess the author of the term did not ride some of the downhills at the MTB Himachal race. This downhill was over in no time and we backtracked the last portion of the ride the same way we started, for total of 32km (20km up and 12km down). There is no Garmin track for this ride as my Edge 500 was in my Camelbak in a powered down state.
Conclusions: this is a really nice ride, the weather in Ross and Fairfax is probably mostly really nice, all mountain bikers and even hikers said hello, and the views fromthe summitt are fantastic.