Each time I’ve run the segment of the Pacific Crest Trail between Inspiration Point and Vincent Gap I’ve been curious about a cluster of young pines in a burned area near Grassy Hollow. The trees appear to be older than similar areas of regrowth along the PCT between Mt. Baden-Powell and Little Jimmy Spring, which burned in the 2002 Curve Fire.
In turns out the area near Grassy Hollow was burned in the 18,186 acre Narrows Fire in 1997. That would make these trees about five years older than the Curve Fire regrowth.
Considering our huge precipitation deficit in Southern California over the past five years, the young trees in the Curve and Narrows fire areas seem to be doing surprisingly well.
Recently, I revisited the coast redwoods along Century Lake in Malibu Creek State Park . Several months ago I’d been disheartened to find many of these trees severely stressed by our five year drought. Several of the trees had lost most of their foliage. Based on my own photos and those from Google Earth, the trees had rapidly deteriorated in just a few months.
I started at the the westernmost redwood near the junction of the Forest Trail and Crags Road and worked east along the Forest Trail. I expected to see a decline in the trees since my last visit, but surprisingly that wasn’t the case. If anything the trees looked they might be doing a little better.
Possibly dead coast redwood at Malibu Creek State Park
From west to east I counted about 16 trees or clonal clusters of trees. Of these, the trees on the bank of Century Lake appear to be the most severely impacted. At least one tree, with poison oak growing up its trunk, may have died.
A common drought response is for a plant to reduce its foliage. The size of its leaves may be reduced and leaf shape modified to reduce water loss. In some cases trees will become dormant and lose their foliage. Trees may also enter seasonal dormancy early and the period of dormancy may be extended.
It’s been my experience that trees respond to severe water stress in a manner similar to losing their foliage in a fire. One redwood that had appeared to be dead in March, now has new epicormic sprouts over the length of its trunk.
Basal sprouting of coast redwood at Malibu Creek State Park
Another mechanism by which a redwood may survive the drought is by clonal sprouting from buds in its basal burl. It is common for coast redwoods to have numerous basal sprouts and sometimes these develop into additional trunks.
The survival of these trees is not only dependent on the drought, but climate factors such as temperature and fog frequency and persistence. Only time will tell if some of the trees are resilient enough to survive.
I squeezed the bag of ice wrapped in the bandanna around my neck and shivered as an ice cold bead of water snaked down my spine. The temperature reading from the shaded sensor clipped to my pack read 106°F.
Sunrise on Golden Gate Promenade near Fort Point Pier
That had been at 3:30 Thursday afternoon at Ahmanson Ranch. Earlier that day the “in the sun” temp recorded at the nearby Cheeseboro RAWS had topped out at a blistering 119°F!
This morning, Sunday morning, my AC100 heat training was on hold. The sun had just risen and I was running on the dew-covered sidewalk of the Golden Gate Bridge. The temperature sensor was reading about 54 degrees cooler than at Ahmanson — an almost chilly 52°F.
Not to worry — I would be back running in the 100 degree Ahmanson heat Tuesday.
When you run a lot of miles, you see a lot of things, but I have to say I never expected to see a Subaru Impreza at Sulphur Springs on the the Cheeseboro Canyon Trail.
Mule deer are common in the Santa Monica Mountains. I see them most frequently in Topanga State Park, near Trippet Ranch, and in Malibu Creek State Park.
My intent was to try and walk past without scaring them. One doe did not run, but the youngster and its companion were more skittish and didn’t quite know how to react.
In some situations a bolting deer can be a real problem. Two friends running in Topanga State Park rounded a corner and were suddenly confronted with a spooked buck running toward them. There was a steep hill on one side and a cliff on the other. In the narrow confines the buck collided with one of the runners, hitting his shoulder and knocking him to the ground. All things considered he was very lucky. The bucks head was up, so the collision only resulted in a sore shoulder and some trail rash.
Crest and clouds on the Pacific Crest Trail at 8900′ near Mt. Burnham in the San Gabriel Mountains. From Saturday’s 30 mile training run on the PCT and AC100 course.
Cirrocumulus undulatus clouds
Temps were a bit more manageable on Saturday than Sunday. Saturday the Big Pines RAWS (6964′) recorded a high of 79°F with an “in the sun” temperature of around 101°F. Sunday the Big Pines high was 89°F with a sizzling “in the sun” temperature of about 109°F.
In addition to the air temperature many Remote Automated Weather Stations (RAWS) report the fuel temperature. The air temperature is the temperature inside a ventilated, sun-shielded enclosure approximately 6 ft. off the ground. The fuel temperature is the temperature of a pine dowel in full sun near the ground. The fuel temperature is a good indicator of the much higher temperature runners and hikers can experience in exposed areas facing the sun.
