The Flora of the PCT
A4 Highway 80 to Kitchen Creek Road

Fig. 1. Clockwise from upper left: Calystegia longipes, Piute morning-glory; Mimulus aurantiacus var. pubescens, hairy bush monkeyflower; Castilleja affinis ssp. affinis, coast Indian paintbrush; Keckiella antirrhinoides var. antirrhinoides, chaparral beardtongue; and Penstemon clevelandii var. clevelandii, Cleveland's beardtongue. Pictures taken in this section by RT Hawke on 4/26/14.
Click on the pictures for larger versions.

Segment StartSegment EndSegment LengthElevation (feet)
Highway 80 (Boulder Creek Campground)Kitchen Creek Road3.8 miles31503985835
This section covers mile 26 to mile 30 from the Mexican Border (see notes on accuracy of mileages).
The one-way hike from south to north has a total elevation gain of 835 feet; see the profile below.
The one-way hike from north to south has no elevation gain; it is all downhill.
A round-trip hike of this section is 7.6 miles, with an elevation gain and loss of 835 feet.

Fig. 2. Left: Rhus ovata, sugar bush. Right: Tauschia arguta, southern tauschia. Pictures taken in this section by RT Hawke on 4/26/14.
Click on the pictures for larger versions.

Survey Dates
The Plant Checklists


This section of the trail is in the Southern Mountains Plant Community, as defined by the San Diego County Plant Atlas. The plant community is almost entirely chaparral.

Although this part of the trail is in sight or hearing of Interstate 8, with considerable road noise, it is a wonderful and popular trail, winding through rolling granite chaparral covered hills. There is a small band of gneiss/schist that runs through the granite, creating a large beautiful waterfall from this more-resistant rock type. The trail follows the Kitchen Creek watershed, first on a side canyon and then through the main drainage itself. The waterfall can be seen off a faint side-track.


Fig. 2. Left: Trail Map for the PCT Section A4 from Highway 80 to Kitchen Creek Road, from USDA Forest Service Interactive Map. Right: Elevation profile from Highway 80 to Kitchen Creek Road (south to north). Click on the pictures for larger versions.

Survey Dates

Surveyed 2/17/2013 by RT and Shaun Hawke, when all but three species were dormant. 62 species observed.
Surveyed 4/26/14 by RT Hawke; 119 species observed.

The Plant Checklists

There are four different versions of the Plant Checklists, which differ depending on:

The lists are:

Separate condensed print versions of just the checklist names are available for all except for the Calflora thumbnail picture version, as a link on each of those pages.

The vouchered species were obtained from a search of the Consortium of California Herbaria on 2 May 2013, for georeferenced vouchers with locations between 32.68 and 32.77° N. latitude and -116.53 and -116.43° E. longitude. The search yielded 632 vouchers of 261 taxa. Two additional vouchers were tossed since they were georeferenced incorrectly. (Vouchers were searched for the A3 and A4 area together.)

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Copyright © 2014 by RT Hawke, Shaun Hawke, and Tom Chester
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Tom Chester
Updated 4 December 2014.