Bear 100 2026 Preview: One Number to Write on Your Hand¶
The gun goes off at 6:00 AM Friday in Logan. Most of what matters was settled in the training block. Two things still matter tonight: how you plan to run the first ten miles, and whether your crew has the right information in their phone.
This post covers both.
What to check before your crew leaves tonight¶
The Bear 100 course has updates for 2026. Before your crew departs tonight, have them pull the official runner guide at bear100.com and confirm they have the current finish location and crew access points. Do not rely on a bookmark from a previous year.
The maps page at bear100.com has the updated course layout for this edition. If your crew already has the 2026 guide, they are set. If not, that is the one logistics task left tonight.
The race that starts where most 100s end¶
Almost every mountain 100-miler holds its hardest climbing for the middle miles, after runners are warmed and fueled and have settled into a stride. The Bear does not work that way. Significant climbing begins before sunrise on Friday morning, before the first gel, before legs have found their rhythm.
This creates a specific trap. Fresh legs feel capable. They are capable, in the sense that they can absorb the effort. What they cannot do is absorb that effort and leave enough in reserve for the miles past forty. Cold muscles at altitude at 6am are working harder than the sensation reports. The chest opens. The pace feels sustainable. The loan is being written before you know you took it.
Conservative is not slower than the plan. Conservative is the plan working. The opening miles are where the whole race is decided, without fanfare, in the dark.
One number to write on your hand¶
Pace targets break on the opening climb. GPS drifts on switchbacks. Darkness removes terrain cues. Cold air and altitude both push heart rate independent of actual effort. The signal that survives all of that is your heart rate against your own ceiling from sustained climb efforts.
Not a generic formula. Yours. From your own training history.
If your runs are in NavRun, pull up the analytics at navrun.app tonight. Look at your long climb efforts from the training block. What does your heart rate look like when you're working at a pace you can hold for hours on end? That number, from your data, is the ceiling you bring into the opening section tomorrow.
Write it on your hand before you sleep. Not to run to that number as a target. To know when you're above it and need to back off before the debt compounds.
What that number does for you on the opening climb:
- It survives the darkness. Pace targets don't.
- It is yours. A generic percentage of max HR belongs to someone else's body, not yours.
- It gives you a concrete signal to act on when your legs are lobbying for more.
Late September on the Bear River Range¶
The aspen are peaking right now. The ridgeline is also cold in a way the valley at the start is not.
Overnight temperatures on exposed sections of the Bear River Range in late September drop below freezing. The temperature at an aid station on the valley floor is not the temperature between aid stations on the ridge. Pack insulation for the ridge, not for the check-in at the bottom.
Two things most runners underpack for this course in September: insulation for the hours before dawn, and headlamp battery life. The opening miles are in the dark. Plan your battery for more time than you expect to need.
Crew logistics, 2026¶
For crew access points, pacer pickup locations, and the current finish details, the official 2026 runner guide at bear100.com is the source. The maps page has the updated course. If your crew has not pulled that guide yet, tonight is the time.
One thing worth confirming specifically: where pacers can join the course, and at which aid station. The official guide names those locations. If your pacer is driving to meet you tonight, they need to confirm the access point before they leave.
For the general framework of when your crew should leave for each location, the crew timing post covers the math. Bear-specific logistics come from the official guide.
The math that should reassure you¶
The Bear 100 has a generous cutoff window for a mountain 100-miler. The course rewards patience structurally, not just as advice. Runners who hold back on the opening section move through the back half with more left than runners who pressed early. That is not motivational framing. It is the structure of how this race works.
If the opening climb felt slower than your ego wanted: that is the plan working.
The Bear River Range is still the Bear River Range at mile 90. The night is still the night. Not something to outrun. Something to stay on your feet long enough to finish.
Your climb efforts are already in the dashboard. Pull up the analytics at navrun.app, find your long training climbs from the build, and write your ceiling HR on your hand before you sleep.
For altitude physiology and how elevation affects heart rate performance, the Leadville altitude post goes deep on the mechanics. The Bear sits lower than Leadville, but the same principles apply when you are in the dark at elevation in the opening miles.
See you at the finish.