Every Street Manhattan
There's a moment in every endurance project where you look at the plan and think: this is either brilliant or stupid, and I genuinely cannot tell which.
Mine happened on a Wednesday morning at Grand Central Terminal, wearing broken-in trail shoes and carrying a pack with a water bottle, a granola bar, and a paperback I was never going to open. I was about to walk every street in Manhattan.
All of them. Every block, every avenue, every dead-end alley south of 220th Street. Five hundred miles of sidewalk, over four months, starting with Midtown.
The reason is a race called the Tor des Geants.
If you haven't heard of TdG, here's the elevator pitch: 330 kilometers through the Italian Alps. 24,000 meters of elevation gain. Twenty-five mountain passes above 2,000 meters, five above 3,000. A 150-hour cutoff. You start in Courmayeur and run — or more accurately, hike — a counter-clockwise loop through the Aosta Valley for somewhere between five and six days without stopping. There are life bases with cots and hot pasta. There is a 60-65% DNF rate.
I got in through the lottery in February. The race is September 13th.
I'm a cyclist. A pretty good one, historically — won the Masters division at RAAM with a four-man team, raced Unbound twice (one finish, one DNF at the 200). My aerobic engine is solid. Resting heart rate of 40. I know what multi-day suffering feels like.
But here's the thing about cycling: it builds zero eccentric loading tolerance. Every pedal stroke is concentric — you push down, the crank goes around, nothing impacts your joints. TdG has 24,000 meters of descent. Every step of that descent at my current 230 pounds generates 575-690 pounds of force through my legs. For somewhere around four million steps.
I'm 55 years old, I weigh 230 pounds, and I need to train my body to descend the equivalent of Everest three times in six days. Starting from a fitness base of CTL 18 on the bike and exactly zero miles of mountain hiking.
So naturally, I'm starting by walking Midtown.
It sounds absurd. Training for a mountain ultra by walking city blocks. But the logic is better than you'd think.
TdG demands three things above all else: time on feet, foot conditioning, and the ability to eat while moving for 130 hours straight. Manhattan delivers all three.
Five hundred miles of walking over four months builds the kind of low-intensity aerobic base that directly supports mountain hiking. Every walk is Zone 1. Every mile conditions the feet — building calluses, toughening connective tissue, testing shoes and socks. And there's a specific reason I'm carrying food instead of stopping at the pizza place on every corner: at TdG, you eat hard cheese, bread, and trail mix out of your pack while walking between life bases. I need to train my gut to process food in motion. Manhattan is the practice course.
The pack starts light — 3 pounds today — and builds to 16-18 pounds by June, matching the weight of TdG mandatory gear plus food and water. Progressive loading. Same principle as adding weight to the bar, except the bar is a backpack and the gym is the entire island of Manhattan.
There's also a less rational reason. Multiple people have walked every street in Manhattan. They've documented it. There are tracking apps for this. And once you know that a completionist project exists, it becomes very hard to not attempt it if you have the kind of brain that got you into ultra-endurance sports in the first place. You know exactly what I mean.
The plan divides Manhattan into eleven zones radiating from Grand Central. Zone 5 is Midtown — home base. Zero subway overhead. Pure grid.
Walk 1: serpentine from 42nd Street to 51st Street, Park Avenue east to 1st Avenue. Walk east on 42nd, shift one block north, walk west on 43rd, repeat. The avenues get covered as connectors. Return south on Lexington. Five to six miles, two to two and a half hours.
This replaces my Wednesday endurance cycling ride. The FTP block continues on Tuesdays, Thursdays, and Saturdays — sweet spot, threshold, VO2max work on the trainer, which I'm not willing to sacrifice. But Wednesday's Zone 2 ride swaps for Zone 1 walking. Different stimulus, same aerobic contribution. The cycling engine stays sharp while the hiking body starts from scratch.
I should be clear about what this is and isn't.
This is not a "couch to ultra" story. I have twenty years of endurance racing behind me. I know how to train, how to fuel, how to suffer productively. What I don't have is any adaptation to the specific demands of mountain hiking at my weight.
The TdG race strategy document my training plan is built around puts it plainly: "Mark is not attempting TdG as a competitive runner. He is attempting it as an ultra-endurance athlete with a monster aerobic engine, decades of experience in multi-day suffering, and a lifetime of mountain experience — who happens to be undertrained for this specific discipline."
The honest odds? I'd put my finish probability around 40-50%. The Section 4 cutoff from Donnas to Gressoney is where most back-of-pack runners get pulled, and it's where my lack of mountain-specific training will matter most. I need to arrive at Donnas at hour 49 with enough time banked to grind through 54 kilometers and 5,900 meters of climbing on legs that have already been working for two days straight.
That starts here. Walking east on 42nd Street with a three-pound pack, learning what my feet feel like after two hours on concrete, figuring out how to eat a granola bar without stopping.
Five hundred miles to go.