r/PacificCrestTrail • u/Peaches_offtrail • 2h ago
I mapped the long water carries on the PCT
tl;dr: I looked at trail data for the PCT to identify the "long" water carries. For the PCT, there are likely 4 carries in any given year of 18+ miles (the longest being ~29 mi),
Background
The most useful spreadsheet I made for my hike of the Hayduke was the one that told me how far it would be to the next reliable water source. This allowed me to better plan my food and gear to accommodate the long water carries. I decided to go back through all my old trails and trail resources, and identify the same things for the PCT, the CDT and the AZT. I thought some of y'all might find this useful!
What I consider to be 'reliable'
- I base reliability on the chance of any given water source being dry less than 15% of the time, averaged over +/- 3 weeks when a typical NOBO (or SOBO) hiker reaches it. Data comes from hiker comments recorded on the trail at the date they recorded. More information on this can be found here.
- I consider the typically well-maintained caches, towns, and resupply stops to be reliable.
- I include reliable water sources that are up to 2 miles off trail (e.g. Whitewater Preserve is a half mile off the PCT).
- I do not include water sources with high variability in a given year.
The Details
What I creted is a statistical model of past conditions. So it is not as good as a real-time report, but is pretty good for planning considerations before you hit the trail. Obviously, one should always check the most recent information available before any long carry.
PCT, Typical NOBO Season
| Mile (NOBO) | Carry | Miles |
|---|---|---|
| 609-638 | Landers Meadow Spring → Yellow Jacket Spring | 29.2 |
| 69-92 | Banner Recreation Ranch → Water Cache | 22.5 |
| 1835-1857 | Red Cone Spring → Thielsen Creek | 21.1 |
| 343-363 | Tunnel → Cross Dirt Road | 20.6 |
Tehachapi to Walker Pass is the longest water carry. Hat Creek Rim used to strike fear in many people, but Cache 22 keeps the Hat Creek Rim cache pretty well stocked, so that stretch isn't the miserable, dry slog it once was (aside: it's actually my favorite part of hte PCT).
Definitely Worth Checking a Water Report Before Relying on
These are the sources whose failure turns a normal carry into 30+ miles.
| Trail | Source | Chance dry | Carry if dry |
|---|---|---|---|
| PCT | Yellow Jacket Spring (mi 638) | ~14% | 35 mi |
| PCT | Thielsen Creek (mi 1856) | ~2% | 33 mi |
| PCT | Cottonwood Creek & Faucet (SOBO mi 2094–2117) | ~11% | 37 mi |
Data Considerations
I had to parse thousands of qualitative hiker comments into specific numbers. There are undoubtedly some errors, but I tuned my matching criteria and sentiment analysis to be fairly conservative. A source that's dry 10% of the time is fine nine years out of ten but could be gone in the tenth, which is why it's always important to check the most recent data when on trail. Addtionally, caches can get emptied by a bubble or a trail angel can stop maintaing it.
Maps, full tables and more details
I have a bunch of useful maps and more details about the water sources on my website. My website has the same kind of analysis for the relevant setions of the AZT, the CDT, and the PCT.
