The beacon people actually clip on is the one that's free at the trailhead.

The fix costs less than one search

• A cheap tag at the gate. A $10–15 LoRa beacon handed out at the Yosemite entrance or the trailhead like a wristband or an anklet — snap it on, forget it. Boxes at the trailheads hold extras for the whole family. Drop it back in the box at the end, or keep it. Solar on the band: leave it in the sun and it charges itself; the gate hands them out charged either way. Two pings, you get both: a rapid ping every couple of minutes when you're moving or you press the button, a slow ping every fifteen when you're still — so the battery lasts the whole trip and then some, and the map still always knows.
• You take it and you're good. The tag pings every few minutes. Tree nodes along the corridors, the herd's harnesses and the ranger flock all hear it. There is always a last-heard point on the map. You never get lost — you just get late. Unless you lose the tag. And the spare. And the other spare. Then — sorry, man, we tried. (Even then: we still have your track right up to where you dropped it, and that is where the search starts — hours of headway, not days. Literally a life saver.)
• One button: find me. Hold the button on the band for three seconds and it goes to distress: full-power transmit, a ping every few seconds, a priority flag on every node that hears it, and an alert on the ranger screen and your family's tags at once. You don't need a signal bar. You need a thumb. And you know it worked: every ping is acknowledged by the node that heard it, and the band answers with a green flash and a double chirp — received. No flash, no chirp: move, climb, get the line up, try again. The band never leaves you guessing whether anyone heard, and on our side the map shows exactly which node heard you and when. It keeps you posted in the quiet too: a soft green blink every so often means "all good — your last pings got through." Go twenty minutes with nothing heard and it tells you before you'd ever notice: a red blink, a chirp, and the voice: "No signal for twenty minutes. Last heard at the creek junction. Climb or get the line up." You always know where you stand — and where you were last seen. With the pocket node it's a text too: "Oh shit — got hurt. Bear got my arm. I'm here, GPS sent, staying put." The station has the pin before you finish typing, your family sees it, and the drone is already lifting.
• We know where you are — and you can text. The same tag family carries short messages over the mesh, no cell signal needed. "Running late, at the lake, all good" reaches the ranger station and your family's tags: fam to fam, tent to trailhead, hiker to ranger. The pocket node on a lanyard does it with any phone and the free app; the wristband beacon does location only. Hikers warn hikers too: "Bear at the creek crossing, big one, heading north" goes out from your tag and lands on every tag on that trail — with the distance: "bear reported 0.6 mi ahead, 12 minutes ago." Text in the wilderness, where no phone has ever had a bar. Same channel for the good stuff: "Buffalo herd in the meadow below the ridge, 40 head." "Elk at the lake, north shore, right now." Hikers pin the rest too: a washed-out crossing, a rockfall, a rattlesnake den by the switchback, the good route around the snowfield, a tip about water at the spring. Danger zones, routes and tips, pinned by the people who just walked it. Sightings pin to the map with a time, so the family two miles back knows where to go to see them — and the park gets a live wildlife map drawn by its own visitors. And it runs the other way — ranger to people: updates pushed to every tag on a trail. "Bear on the loop ahead, hold here." "Collared bear heading for the campground, 400 yards out, moving your way" — so now you've got time to lock up the food and get it in the car before he gets there, instead of finding out when your car is the soda can. Bears do that every single year — Yosemite logs hundreds of bear incidents and hundreds of thousands of dollars in damage annually, and it is the same few habituated bears on the same loops. With those bears collared, the campground knows they're coming every time. "Storm over the ridge in forty minutes, turn back." "Trail closed past the falls." "Park shutting down at six, head to the gate." "Concert at the meadow at eight." One message from the station reaches everyone out there at once, no bars, no app store. And the search itself becomes a conversation. The team has your coordinates on the map; they text you back: "We see you. Go down past the big tree, follow the stream, stay on the left bank — we're forty minutes out." You walk toward them instead of away — or, if you're hurt, "Stay put, keep warm, we have you," and the drone is overhead in twenty minutes. Most searches end before they start.
• Drones find the ping. When someone is overdue, a drone with a LoRa receiver flies the corridor and hears the tag from the air — a whole valley in twenty minutes, at night, in weather a helicopter won't fly. Then a thermal camera confirms. No signal at all? The drone flies straight to the last location on the track and scours outward from there — the search radius is a few hundred yards, not a mountain range. One drone flight instead of a hundred boots and a helicopter.
• Two things in your hand, one on the post. The free wristband does almost everything: it pings, it has one button (hold for distress), and it has a coin-sized speaker with a few hundred pre-recorded clips on the chip — "bear ahead, hold here", "storm in forty", "turn around, trail closed", the countdown — each triggered by a two-byte command over the mesh, so the band itself talks without ever carrying audio over the air. New clips and commands load in the gate box when you return it, or over the mesh overnight, so the park updates every band as it needs to. The band also hides the oldest rescue tool there is: hold the button and the speaker doubles as a whistle — a 110 dB locator chirp every ten seconds so a ground team hears you before they see you, and a moulded whistle in the clasp that works with the battery dead. No bright orange, no gadget look; it reads as a plain band until the day it matters. If you want to type and see the map, the pocket node pairs with the phone you already carry — rent it for a few dollars a day or buy it at the visitor center, a new line of sales for the park on top of the searches it never has to run. That's it: no screen tag, no extra gadget — a display eats the battery and nobody reads a watch-sized menu in the rain. The talking box isn't a rental at all: it's a speaker node on the campground-host post, park-owned, one per loop, that turns the mesh data into words.
• The backcountry kit, for the ones who want it. Deep canopy, a slot canyon, the mouth of a cave: the band's ping can't get out. The rental kit fixes that the old-school way — a pocket slingshot, a spool of line and a 40-gram antenna puck on a thin copper lead. Shoot the line over a high branch, haul the puck up thirty feet, clip the lead to the pocket node, and you're above the trees and on the mesh from a place no radio has ever reached. Same trick off a canyon rim or a ridge. No branch? A $40 palm-sized drone in the kit lifts the same puck and lead a hundred feet straight up, hovers, and you're on the mesh in a minute — light enough to live in the top of the pack. Better: the drone carries its own node. Press once and it flies itself to clear air — up, or to the nearest spot the map knows has signal — pings your position and your message from up there, and comes back to your hand. You never leave the cave mouth; the drone does the walking. Weighs less than a water bottle; rents with the node. Get the line up, and be saved.
• Small enough to forget. Today's tag is the size of a matchbox on a band. The next one is AirTag-sized: a wristband, an anklet, a necklace, a bag tag, a belt hook, a zipper pull, a dog collar — same radio, same mesh, same map. Wear two or three in different spots — wrist, ankle, pack — so a lost one, a swim or a fall never leaves you dark. Hand a family five at the gate and nobody notices they're wearing them until the day it matters.
• Whole park, for years, cheap. A few thousand tags, a few hundred tree nodes, a ranger drone: less than the price of a single multi-day helicopter search, and it keeps running.

• Where every single bear dens, every year. The harness goes quiet in the same hollow each November and wakes in the same one each spring — den sites, den fidelity, emergence dates by elevation and snowpack, cubs out with mom. The agency gets the map it has never had, and the closures around dens stop being guesses.
• Buffalo patterns. Mount the herd and the migration draws itself: the rut grounds, the winter range, the river crossings, the day the herd decides to move and what the weather was doing. A dozen collars on the lead animals tell you where four thousand are going.
• Wolves. This one goes deep. A pack on the mesh is a live map of territory, hunts, kills, den sites, the dispersers that leave to start new packs and the corridors they take to get there — every day, not one plane flight a month. Where the wolves go, the elk move, the willows come back, the rivers change: the whole cascade, measured. And a rancher gets a text when the pack crosses the fence line, before the calves do.
• Elk, deer, big cats, bighorn, condors, tortoises — we mount anything. A harness, a collar, a leg band, a backpack mount, a shell tag: same 15–30 g radio in whatever the biologist already uses, under their permits, on animals they already handle. If it moves, it can carry a node; if it carries a node, it draws its map.
• A park site people actually open. The same map, the public side: today's hot spots — where the elk are this morning, the meadow the buffalo picked, the bear-closed loop, the trail with the wildflowers — plus the gatherings: ranger talks, the star party, the concert at the meadow, the volunteer trail day. Live, daily, drawn by the animals and the visitors. Visitors go where the wildlife is and away from where it shouldn't be bothered.
• The data stays theirs. Raw tracks go to the agency and the university; the park's public map shows what the biologists choose to show, delayed and blurred for the sensitive species. Poachers get nothing.

• Check in before you leave. On the site or the app, in town, while you still have bars: your route, your car, who you're with, your turnaround time, and "if you don't hear from me by 8 PM Sunday, come." One minute. Free. 99 cents a year if you want the premium map and family sharing — and the state should be the one paying that.
• We tell you what's out there. The moment you log the location the database answers: where the mesh has coverage on that route, where it doesn't, the last-heard points from other hikers this week, the pins, the dangers, the water.
• We know you might not ping out there. That's fine. Silence in the backcountry is expected, not an alarm. The clock is the plan you set, not the signal.
• Ping in when you're back. Hit "I'm out" in town, or the tag pings a gateway on the way home and closes it for you, or just go online and say you're back. Done.
• If we don't hear from you in time, we send help. The clock runs out, the system pages the ranger district and the county SAR with everything you logged — route, car, last-heard point, the tag ID — and the first thing that flies is the drone, straight down your route, listening for your band. Then the people. You're found before you'd have been reported missing.

Where they go

• Crown. From the top of a giant sequoia a relay holds line of sight for kilometres.
• Ridge. Ridge nodes carry the valleys the canopy can’t see into, and cover the hours the flock doesn’t fly.
• Trail. Nodes follow the corridors and the trailheads, because that is where the collars and the free hiker tags actually are.
• Handoff. Every node relays for every other and drops the log at the ranger station over Wi-Fi. Nothing needs cell service.
• Self-reporting. Battery, yield, uptime. A quiet node is a ticket before it’s a gap: the dashboard names the neighbours each node can still hear, so a dead relay shows as a shrinking circle, not a silent one.