Developing cones on a limber pine near the start of the Vincent Tumamait Trail on Mt. Pinos (8831'). Limber pines are a hardy, 5-needled, species generally found at higher altitude in the western U.S.

Limber pine (Pinus flexilis) is a white pine, related to whitebark and bristlecone pines. They are slow growing, and can be very long-lived. According to the Gymnosperm Database, two trees have been crossdated with ages of about 1600 years.

In Southern California limber pines are found on Mt. Pinos, Mt. Baden-Powell, San Gorgonio Mountain, Mt. San Jacinto, and some other areas above about 8500'.

Related post: Forest Green

Its long limbs bending with the weight, a sugar pine reaches as far as it can to drop its heavy, resin-covered cones.

Because of its short needles and long branches, the silhouette of a sugar pine is particularly distinctive.

From Sunday's run on the PCT.

Some related posts: Sugar Pine & Clouds, Kratka Ridge Sugar Pine

It was about 9:45 a.m., and I was switchbacking up through a surprisingly dense forest of California bay on the Hondo Canyon segment of the Backbone Trail. The trail was carpeted in bay leaves, and a hint of the sharp, sweet smell of bay lingered in the still morning air. It had been four years since I had run this trail, and I had forgotten just how lush and green it was. The geology, oaks, bay trees, ferns, and poison oak were spectacular.

Last year's Station Fire, and the Winter storms that followed, combined to damage many miles of trail in the San Gabriel Mountains. Among the volunteers working hard to restore the trails are runners that will doing the Mt. Disappointment 50K and Angeles Crest 100 mile endurance runs later this Summer.

Gary Hilliard, trail maestro and R.D. of the Mt. Disappointment runs, dedicates an astonishing amount of time to the task of preserving trails -- encouraging and organizing volunteers, surveying trails, and doing the down and dirty work of maintenance and restoration. If it's a Summer Saturday, chances are good you'll find him in Angeles National Forest, working with a group of runners to make a trail better.

Today's trail was the Kenyon DeVore Trail on the north side of Mt. Wilson. Originally a part of the Rattlesnake Trail, the trail was renamed in tribute to the Forest Service patrolman, hydrographer, and Angeles National Forest volunteer, Kenyon DeVore. The trail is the toughest part of infamous final leg of the Mt. Disappointment 50K and 50 mile courses, climbing about 2300' in 3.6 miles.

There was plenty to do on the Kenyon DeVore Trail, and Gary divided us into three groups. One group was given the job of restoring a long stretch of trail that had been obliterated by debris flows, and another group was assigned the chore of clearing a rock slide. Our group's task was removing several trees that had fallen across the trail, and working on the trail along the way.

The largest of the trees blocking the trail was a sizable bigcone Douglas-fir. At the point where it was cut, the diameter of the trunk was about 26"-28". For its size, the tree was surprisingly old. A rough count of the rings from a contrast enhanced photo gives an approximate age of 310 years. The age was not cross dated, but appeared reasonable when compared to a standard tree ring chronology.

The cut sections of the tree had no obvious fire scars. The CDF/FRAP Fire History Database indicated that, prior to the Station Fire, a large part of the canyon in which the tree was located had no reported fire history.

When we were done, about two-thirds of the Kenyon Devore Trail had been restored. No worries about the other third, Gary has trailwork scheduled most weekends through the end of July.

Given its vibrant chartreuse color, it isn't surprising that wolf lichen (Letharia vulpina) has been used by various indigenous groups to make a dye. Perhaps more of a curiosity is that it is toxic, and has reportedly been used as a poison, and medicinal remedy.

From Sunday's trail run in the Chumash Wilderness on the Vincent Tumamait Trail.

Some related trail runs: Fresh Air Traverse, Mt. Pinos - Mt. Abel Out & Back

From today's run of a variation of the Boney Mountain Half Marathon course from Wendy Dr.

Related post: Above Satwiwa

From a January run in Malibu Creek State Park.

Shorts and short sleeves. Temperature 75 degrees.

From today's run from Kanan Rd. (Tunnel #1) to Tapia Park by way of Newton Canyon, upper Solstice Canyon, Castro Crest, Bulldog Motorway, Century Lake, and the Tapia Spur Trail.

Early morning sunlight filters through the oaks and sycamores in upper Las Virgenes Canyon.

From today's run of Cheeseboro Ridge from El Scorpion Park at the west end of Vanowen in the San Fernando Valley.

A high contrast study of the twists and turns of the disintegrating bole of a lodgepole pine on the slopes of Charlton Peak.

From the 26 mile San Gorgonio High Line trail run a couple of weeks ago.

Also from Sunday's run on the Backbone Trail in the Santa Monica Mountains.

The windward side of this foxtail pine snag has been blasted by the icy winds of a multitude of Winter storms. The wind has sculpted the mineral-like wood, exposing and accentuating its inner layers.

The photo is from last Saturday's Cottonwood Pass - New Army Pass trail run. Nearly all of this route is above 10,000 ft. and 12 miles of it are above 11,000 ft. This relatively dry, high altitude habitat is home to the southern foxtail pine (Pinus balfouriana subsp. austrina).

One of the less common Sierra conifers, the tree is a long-lived species that is closely related to the bristlecone pine. The FEIS database references a southern foxtail pine 3400 years old, and the Gymnosperm Database a specimen with a crossdated age of 2110 years.

Because the tree grows so slowly, the wood is dense, and dead trees are slow to decay. In the vicinity of Cirque Peak, and a few other areas, dead foxtail pines and remnants are found above the current tree line. By crossdating tree ring sequences, a study published in 1997 found that over the past 3500 years the tree line in this part of the Sierra has generally been higher than it is now.

The study deduced that one period of reduced tree abundance and lowered tree line elevation was associated with warmer temperatures, and at least two severe multi-decade droughts. In contrast, the most recent decline has occurred during a cold, wet period that started about 450 BP.

It is remarkable that some of the dead foxtail pines studied here were alive during the Bronze Age, 4000 years BP.