Doug
Great Story! Used to be a really great trail, but it has changed a lot since it is regulated by the Forrest Service. As soon as we have a moderate [don't laugh, L.A. does get a fair amount of snowfall in the local mountains] snowfall they will close the trail
A few things have changed since you have run this trail. You can't cruise down the creek / stream anymore and there aren't really any "Furniture" sized boulders anymore, that used to line the stream / creek.
Now, you enter the trail by crossing the stream / creek, and then make an immediate righthand turn and climb a steep, hill with a 25 to 30 ft drop off on the right to the stream. The trail then traverses back & forth up the hill & through the trees, which is a dirt trail with the occasional tree root, small rocks, and zig / zag through tight trees. The trail then crests the hillside and you cruise along the mountain ridge for a while, mostly through scrub brush flora and then you decend down to the base of kabob hill.
This decend used to be quite difficult as one small section of the trail was off-camber to the downside of the slope with nothing on the hillside to stop the roll!. Now this section has been graded and the trail decends quite easily with a couple of switchbacks to the valley basin.
This basin has a couple of other one way trails [in / turn-around / out] like "yellow jacket", etc., and makes a nice pinic area. The hill now has a weaving / traversing trail of tight turns / water run-off ruts and some rocks as you climb to the top. This hill used to be fun because you could go straight up the hill, which was challenging but now has been closed. Once you reach the top of the hill it changes again to a ridge run with a few minor switchbacks either deceding or ascending a few small hills, and then you finally reach the base of a fun little rocky climb.
This is the climb you mention at the end of the trail, which is fun jaunt up the hillside with lots of little rocks, rock shelves, occasional boulders, washouts & tree roots as you near the summit of Alamo mountain. This ends in a nice forrested area, which now has numerous forrest signs showing the way down the trail to a paved road. This road can lead out of the area to the 5 freeway, or to the motorcycle area, and / or to the small "testing" / "playing area", i.e. hillside climb, small rockpile, etc.
This is a great trail for practicing your driving skills or a good day of fun wheeling. It is a blast during the early winter / spring months with snow / ice and / or water run-off completely changes the trail. One local club has a run every year on Halloween night - Frightnight, which is a blast!
Joe