Training for your first hundred — twenty-four weeks, plainly.
A real 24-week build for a 50-mile-per-week base runner. Back-to-backs, taper math, and what to drop when life gets in the way.
Read the guide →Filed under: 50K · 100M · 200-mile · the long miles
A field journal for ultrarunners.
A short, careful Wednesday letter — calculators that respect your kilometers, gear notes from people who've been at mile eighty, and the long pieces no one else writes.
Endure Weekly · Free
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Free Ultimate Zone 2 Training Guide on signup. Wednesday letter, never slop.
100 Mile mind
12,420 Vert this week
№042 Issue, Wednesday
From the Index · Long Reads
The pieces we keep coming back to.
Substantive long-form for ultrarunners — training, race-prep, the things that actually move your finish time. Mostly written from inside the bib.
Fueling by the hour.
A working calorie clock for 12 to 36 hours of effort. Real food vs gels, sodium math, the bonk window.
Read the guide →A field guide for crews and pacers.
What to put in the cooler, what to say at mile eighty, and the small things that quietly save a hundred-miler.
Read the guide →Back-to-back long runs, weekend by weekend.
Why the BTB workout is the single most important block in ultra prep — and how to build them without breaking yourself.
Read the guide →Calculators · Built for the long miles
Numbers that respect your kilometers.
The calculators general-running sites don't have. Vert math, drop-bag planners, fueling clocks. All free, no email-gate.
● Live · Free · No email gate [ READOUT 03 / 03 ]
12,420 FT GAIN
Vert Calculator
How much climb you'll do, what it costs in time, and the equivalent flat-mile pacing.
Run the math → 07 AID STATIONS
Drop-Bag Planner
What to put in each bag, by aid-station distance, weather, and time-of-day.
Plan the bags → 23:45 FINISH TIME
Ultra-Pace Calculator
Adjusted pace for distance, vert, and your training base. Honest splits, sub-24 dreams.
Run the predictor →Gear · Hands-on, not affiliate-farmed
Kit we'd carry to mile eighty.
Reviews written by people who actually own the vests, run the lights, fall on the poles. Backcountry & Amazon links; we earn a small commission, never paid for placement.
№ 01
Best Running Vests 2026
The 100-mile vests. Salomon, UltrAspire, Black Diamond. Soft-flask compatibility, chafe profile, capacity by event.
12 picks reviewed →№ 02
Best Ultra-Running Headlamps
Petzl, Black Diamond, Knuckle Lights. Burn-time math, beam pattern, what survives 14 hours of dark.
9 lamps tested →№ 03
Best Trekking Poles
Black Diamond Z, Leki Cross Trail, the carbon vs aluminum question. When poles save your race.
8 poles compared →Races · The roster
North America's iconic ultras.
Race intel that runners actually need: qualifying paths, course profile, gear lists, what the lottery looks like this year.
A note from the studio · Issue №042
Ultrarunning is the long answer
to a short question.
How far?
A little farther than you think.
— Endure Weekly · Denver, Colorado
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