Pumped up on caffeinated Starbucks, I made the drive over Mt. Hamilton in about
two hours, a bit slower than estimated by Google Maps. Once out of San Jose, I
saw only one other vehicle in the whole time. This place is pretty remote given
how close it is to the Bay Area. My original idea to climb
a ridgeline north of Copper Mtn proved unworkable as there were steep cliffs
along the road in this area. I backtracked a mile and half to a bend in the
road where I figured I could gain access to the ridgeline from the west. This
worked out quite nicely, making use of a combination of
cow trails, firebreaks,
and old roads. The weather continued to be fine, perhaps 50F with a moderate
breeze blowing, good enough to go without a jacket. The moon was about 3/4 full
and high overhead, setting about the time I was done hiking for the night.
It took about 45 minutes to gain the main north-south ridge leading to Copper
Mtn. Along this ridge at a saddle was 
an outhouse
with dual commodes. I found it somewhat disturbing that both seats
might actually get used, and even more so that someone thought to design it
that way. Brokeback Mtn? Outside were the busted and rusted
remains of various
household items including a sink and porcelain toilet. I'm not sure I'd want to
hear the story of what went on here.
Another fifteen minutes along the ridge brought me to the summit of Copper Mtn.
There is a ten-foot 
steel structure with some type of
reflective orb in 
the center,
presumably used in a survey project, allowing someone down in the
Central Valley to sight it from a large distance. I looked around for the
benchmark indicated on the topo, but found none. There were a great many more
lights of the Valley visible from this summit compared to the more remote
location I was on the previous night. Patterson, Tracy, Modesto, and other
towns I couldn't identify could be seen. Looking in the other three directions
was rolling hills without a single light to be seen anywhere.
In retracing my route I tried to make better use of some of the roads, but
they did not continue down the mountainside as I expected.
They stopped in several
clearings, possibly old mining sites, now just storage for
random junk. I ended
up climbing back to the original route along the steep, west-facing ridge and
returning the same way. Just under two hours car-to-car.
Back in the car, I proceeded about four miles east to the junction with the Mt. Oso Rd. Just as in StreetView, the gate was opened at the start. I immediately drove in and started up the road. There are a handful of residences about 100yds inside the gate on the west side of the road as it turns northward. There were lights on in a number of these, but no signs of anyone running out to accost me. It looked like I might make short work of Mt. Oso.
The pavement ends just past the homes but the dirt road is in good condition
and navigable by any vehicle. At an unsigned junction I bore left, the
seemingly obvious choice. At Ballard Flat, 2.5 miles from Del Puerto Rd,
another fork is encountered, this one
signed for Mt. Oso to the left. Just past this 
a gate
with a dozen locks blocks the road. Hmmm. It was just before
midnight and it looked like I would have to do 13 miles of hiking. Oh well,
better than 18 miles I would have had if that first gate had been locked. It
took only a minute to park the car, gather my gear, and be on my way.
The good road, maintained for the myriad of technicians that must drive up this
way regularly, makes navigation trivial. The road initial goes by some old
cattle enclosures and a 
cattle ramp,
then heads up a narrow, shady canyon before
switchbacking up to the west-trending ridgeline north of Washington Canyon. The
views begin to open up at this point with fine views of Del Puerto Canyon to
the south, Ingram Canyon to the north, and the lights of the Central Valley to
the east. Once higher up, the western horizon is occupied by the N-S spine of
the Diablo Range, the border between Santa Clara and Stanislaus counties.
Following a steady climb, the halfway point is marked by a small downhill to
a three-way ridge junction, the main road now turning northwest towards Mt. Oso.
A 
second locked gate is encountered shortly,
all the telecom towers now located on
property north of this gate. To the left is a fenceline signed as the property
boundary for the 
Buckeye Ranch.
Rolling terrain along the ridgeline is encountered for about a mile and a half,
then the final steady climb up to Mt. Oso. By jogging the short downhills, I
managed to make it to the summit in a bit less than two hours.
There appears to be two possible highpoints near the north summit (the south
summit, half a mile away, is clearly lower). The topo map shows the measured
highpoint to be to the north, past a third locked gate. I hopped the fence
here, despite 
dire warnings of high RF fields and other hazards,
and examined the rocky outcrop
near a utility building. Nothing much of interest here. Back on the other side
of the fence, I went up to examine the lookout tower. It is overshadowed by
much higher antennae put up around it, but the lookout tower has a feeling of
history to it as the original inhabitant of the summit. A powerful light is
mounted on the underside of the tower, visible along much of the road
I traveled to reach it. A
nighttime exposure shows it with a green glow, but
there was no such color when viewed in person. I took a photo of
the moon a few hours before setting as well as a view east to the
Valley lights. I climbed
the tower stairs but found the trapdoor to the viewing platform
locked. It had
been fairly windy the last few miles to the summit but three flights of stairs
up it was perhaps twice as windy - and cold. I didn't try to circumvent the
padlock by climbing around the railings on the outside as I've done elsewhere -
it was too cold to enjoy the platform anyway.
More jogging on the way back made the return much quicker, taking only about 70 minutes to reach the car. It was now 3a and time to head home. On the drive out I was accosted by a frantically barking dog near the homes, but he was no Cujo and no match for my steel chariot as I simply drove by and out the gate to Del Puerto Rd. Rather than repeat the ridiculously windy road back over Mt. Hamilton I drove the nine miles out to Interstate 5 and took the freeway route through Livermore. This turned out to be much faster and got me home to San Jose by 4:45a. It was still quite dark out, but I decided to stay up until the family got up at their usual time around 6:15a. I had breakfast with them, saw them off to school, and promptly went to bed for some much needed rest. A good night!