I was walking on North Escape Road near Big Basin park headquarters and noticed this very tall tanoak tree. There's lots of small tanoak bushes in the undergrowth of redwood forests, but you rarely see a large tree. I recently learned that this is because great quantities of tanoaks were chopped down to get the tannin in their bark for tanning leather, from the 1850s well into the 20th century, and the trees are slow growing. So this one is a double survivor: the leather tanners didn't get it and the 2020 fire didn't get it. It seems to have almost no damage at all.
You're looking for a camo taped centrifuge tube (similar size and shape to a preform). The cache is wheelchair accessible except for perhaps the final two steps, so I'm callling it 1.5 terrain. Dogs are allowed on North Escape Road (and pretty much nowhere else in the park headquarters area).
Parking is $8 with a reservation and $10 without. If you don't make a reservation on a busy weekend, you might need to park in the Saddle Mountain overflow lot and take the shuttle bus, otherwise it is a short, flat walk from the parking lot.
Happy caching.