I hiked up Jacumba Peak from the wash heading south from the Mortero Palms trailhead. (Route B on the DPS description) It takes you up a delightful wash and then up a steep hillside to the ridge line north of the summit.
More obstacles in the wash
View looking east on the ascent up Jacumba Peak
Jacumba Peak
View to the east from the summit
View to the north
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The start of the descent wash
Wash before the drop
Lone Palm in the south wash
Walk 2: Heading up the canyon to the south on the way to Jacumba Peak