Category Archives: nature

Woolsey Fire Preliminary Burn Severity and Selected Trails

Google Earth image of a preliminary burn severity map for the Woolsey Fire from NASA Earth Observatory with selected trails added.

The Google Earth image above shows a preliminary burn severity map for the Woolsey Fire from NASA Earth Observatory, as posted by NASA’s Rehabilitation Capability Convergence for Ecosystem Recovery (RECOVER) web site on November 15, 2018. Here is a larger version of the map.

The initial burn severity estimate is based on a Burned Area Reflectance Classification (BARC) derived from satellite data before and after the fire. In the map above the burn severity classes are high (red), moderate (orange) and low (yellow). Note that areas within the fire perimeter that are not included in these classes may still have burned. Also note the fire was still burning when this assessment was made.

GPS tracks of the Backbone Trail and some other trails in the region have been added. Trail and placename locations should be considered approximate.

Related post: Woolsey Fire Map with Perimeter and Selected Trails

Woolsey Fire Map with Perimeter and Selected Trails

2018 Woolsey Fire Map with Perimeter and Selected Trails

The Google Earth image above shows a recent perimeter for the 2018 Woolsey Fire along with GPS tracks of the Backbone Trail and some other trails in the region. The Hill Fire perimeter and 2013 Springs Fire perimeter (purple area) are also shown. Trail and placename locations should be considered approximate. Here is a larger version of the map.

The perimeter was was downloaded from GEOMAC and timestamped November 18, 2018 at 5:59 a.m. If the timestamp of the perimeter of the displayed map doesn’t match, try refreshing/reloading this page. The perimeter has been refined and the acreage is a slightly less than previously specified.

As of November 21, 2018 6:11 p.m., the Cal Fire Incident Page for the Woolsey Fire indicated that the fire had burned 96,949 acres and was 100% contained. The fire started on November 8, 2018 2:24 p.m.

Skyline to the Sea – Fall 2018

Towering redwoods along the Skyline to the Sea Trail, Big Basin Redwoods State Park
Towering redwoods along the Skyline to the Sea Trail, Big Basin Redwoods State Park

Update July 20, 2020. Here’s a Google Earth image of a CZU August Lightning Complex Fire perimeter from the National Interagency Fire Center (NIFC). The date and time of the perimeter is indicated. My GPS track from the PCTR Skyline to the Sea Marathon in Castle Rock and Big Basin Redwoods State Parks is also shown. The locations of all placemarks and trails are approximate. For official information see the CAL FIRE CZU August Lightning Complex and InciWeb CZU August Lightning Complex incident pages.

There’s a reason that Skyline to the Sea is Pacific Coast Trail Run’s biggest event. Close your eyes and picture your ideal trail. The trail of your dreams might be hard-pressed to match the appeal of the Skyline to Sea Trail.

There is something magical about running in an old-growth redwood forest. Established in 1902, Big Basin Redwoods State Park was the first state park in California. It’s redwoods reach 2000 years in age, 328 feet in height and 18.5 feet in width!

The Skyline to the Sea Trail has a net elevation loss, but enough uphill to get your attention. Many miles of the trail are as smooth as a carpet, but some are rocky, root-strewn and technical. It is often cool under the dense forest canopy, but it can also be warm and humid. I was surprised to see an “Emergency Water” stash a mile before the last aid station. In some years it is well-used and much appreciated.

The Park supports a vast variety of animal and plant life. Some plant species can only be found in the Park and a seabird (Marbled Murrelet) nests in its old-growth conifers.

In some years one park species can add extra adrenaline to the race. This year Brett (my son) and I were counting down the miles to mile 4.0 of the Marathon. The R.D. had reported encounters with the beasts at that point of the 50K on Saturday. About 20 yards before mile 4.0 Brett saw what looked like a “cloud of dust” and shortly after that we heard agitated voices from the runners ahead.

In it for the full experience, we — and several other runners — plowed headlong into the cloud. The yellowjackets didn’t like that. A number of us were stung; some several times. The day before a runner in the 50K was stung 18 times.

Yellowjackets or not, running the Skyline to the Sea Marathon was like running a 26 mile nature trail and one of the finest courses I’ve done.

Many thanks to R.D. Greg Lanctot and Team PCTR and all the volunteers that helped with the event. For all the results and more info see the Ultrasignup event page, PCTR’s web site and Facebook page.

Here are a few photos taken along the way. Mileages specified are from my fenix 3 and are approximate.

Sage Ranch Micro-Wilderness

Sage Ranch Micro-Wilderness. Photography by Gary Valle.

Sage Ranch is a Santa Monica Mountains Conservancy open space area adjacent to the Santa Susana Field Laboratory (SSFL) Superfund site.

The sandstone rocks are an exposure of the Chatsworth Formation, which extends from the Simi Hills across the 118 Freeway to Rocky Peak and the Santa Susana Mountains. The popular rock climbing area Stoney Point is a well-known example of the Chatsworth Formation.

Geology and climate are the foundation elements of habitat. They influence — and sometimes dictate — the plants that inhabit an area. The plant Santa Susana Tarweed is very common on exposures of Chatsworth Formation sandstone, but rare elsewhere.

Exposures of Chatsworth Formation sandstone in Sage Ranch Park and Rocky Peak Park are sufficiently rugged as to create areas of isolated micro-wilderness within urban open space.

Bush Senecio on Temescal Peak

Bush Senecio on Temescal Peak. September 23, 2018.

Yellow seems to be the predominant color of late-summer and fall wildflowers in Southern California. In addition to the bush Senecio pictured above; rabbitbrush, goldenbush, tarweed, telegraph weed and common sunflower come to mind.

From a recent run of the Trippet Ranch loop, with a side trip to Temescal Peak.