How many carbs per hour for Leadville?

Evidence supports 60–90 g/hr for trained endurance athletes, with up to 120 g/hr possible after gut training. Altitude and individual tolerance usually push most Leadville riders toward the lower end of that range.

How much water should I drink at Leadville?

Most riders need 500–1000 ml/hr, but the actual number depends on sweat rate, temperature and altitude acclimatization. A pre-race sweat test is the only reliable way to personalize it.

How much sodium do I need?

Typical race intakes fall between 400 and 1000 mg of sodium per liter of fluid. Riders with a salty-sweater profile often need more.

Should I use caffeine?

3–6 mg/kg of body mass is the evidence-based range, ideally split across the race. Always rehearse the dose in training first.

What should I eat before Leadville?

1–4 g/kg of carbohydrate 2–4 hours before the start, from familiar low-fiber, low-fat foods. Avoid experimenting on race morning.

How do I avoid bonking on Columbine?

Fuel by the clock from the gun, keep carbohydrate intake steady through the climb, and never skip Twin Lakes on the way in or out.

How should I fuel the Powerline climb?

Top up carbohydrate and caffeine at the base, keep intake liquid where possible, and pace by heart rate or power — not by ambition.

How hard is the Leadville Trail 100 MTB?

Extremely hard by any measure. 103 miles, ~12,000 ft of climbing, an average elevation above 10,000 ft, and a 12-hour cutoff. Finish rates typically fall in the 60–70% range, with fitness, altitude adaptation and fueling all decisive.

How long does it take to finish the Leadville 100?

Elite riders finish in 6:15–7:00, sub-9 Big Buckle contenders in 7:00–9:00, most amateur finishers in 9:00–12:00. The overall cutoff is 12 hours.

How much climbing is in the Leadville 100?

Roughly 12,000 ft (3,650 m) of total climbing across four major climbs: St. Kevin's, Sugarloaf, Columbine and Powerline (return).

What is the cutoff for a Big Buckle at Leadville?

Sub-9 hours earns the Big Buckle. Sub-12 hours earns the Silver Buckle and an official finish.

What are the intermediate cutoffs at Leadville?

Cutoffs apply at Twin Lakes outbound (roughly mile 40) and inbound (roughly mile 60) and at Pipeline inbound (~mile 73). Miss one and your race is over — always check the current year's Athlete Guide for exact times.

How many aid stations does the Leadville 100 have?

Six aid stations along the course: Pipeline outbound, Twin Lakes outbound, Columbine Turnaround, Twin Lakes inbound, Pipeline inbound, and Carter Summit / Powerline area — plus the finish. Crew access is allowed at Pipeline and Twin Lakes.

Where can I use drop bags at Leadville?

Drop bags are typically staged at Twin Lakes, which you pass twice (outbound around mile 40 and inbound around mile 60). Confirm the current-year policy in the official Athlete Guide.

Hardtail or full suspension for Leadville?

Both win. A modern hardtail is lighter and efficient on the fire-road climbs; a short-travel (100 mm) full-suspension bike saves your body on the descents and rough sections. Ride what you train on.

What tire width and pressure for Leadville?

Most riders run 2.2–2.4" tubeless tires. Typical pressures for a 70–80 kg rider are 18–22 psi front, 20–24 psi rear, adjusted for casing, rim width and body mass. Always test at altitude in training.

What gearing do I need for Columbine and Powerline?

A 32–34t front chainring paired with a 10–52t (or 11–52t) 12-speed cassette gives most amateurs a bailout for Columbine and Powerline. Elite riders often go 34–36t front.

Is a dropper post worth it at Leadville?

For most riders, yes — Powerline and Sugarloaf descents are fast and rutted. The weight penalty is small compared with the confidence and recovery it buys.

How many weeks should I acclimatize before Leadville?

Ideal is 3–4 weeks at altitude before the race. If that is impossible, aim to arrive 7–10 days early or, alternately, arrive within 24 hours of the start so the acute altitude response is minimal.

How much does altitude reduce my power at Leadville?

Expect a 10–17% reduction in sustained aerobic power at 10,000–12,000 ft compared to sea level, even with good acclimatization. Pace by heart rate or perceived effort, not by sea-level power numbers.

What should I wear at the Leadville start?

A short-sleeve jersey, bib shorts, arm warmers, a light vest or packable shell, full-finger gloves and a cap under the helmet. Most riders shed layers at Twin Lakes on the return.

What is the weather like on race day?

Typical August race day: 34–40 °F at the 6:30 AM start, 68–78 °F midday, low humidity, high UV, and a real chance of afternoon thunderstorms or hail on the return.

How many calories per hour do I need at Leadville?

For an 8–12 hour effort, most riders target 240–360 kcal/hr, primarily from carbohydrate. Larger and faster riders trend higher; smaller or altitude-sensitive riders trend lower.

How do I pace the Columbine climb?

Cap effort at high Zone 2 to low Zone 3 heart rate (or ~75–80% of your altitude-adjusted FTP). Stay on top of carbs and fluids and expect the last 2 miles to slow dramatically as the air thins above 12,000 ft.

How do I qualify for the Leadville 100?

Entry is via lottery, the Leadville Qualifier Series (top finishers at qualifier races), the coaching-programs route, or charity slots. Auto-entry exists for previous Big Buckle finishers.

When is the Leadville 100 MTB in 2026?

The 2026 edition is scheduled for Saturday, August 8, 2026. The race is always held on the second Saturday of August. Always confirm the current date on the official Athlete Guide.

How much does it cost to enter the Leadville 100 MTB?

Entry fee for recent editions has been approximately $475 USD. Coaching-program slots (Carmichael Training Systems, HPT, etc.) run $2,000–$4,000+ and include a guaranteed entry. Charity slots vary by partner organization.

How do I enter the Leadville 100 lottery?

The Leadville Trail 100 MTB lottery typically opens in mid-October and closes in late November. Register online at leadvilleraceseries.com. Odds fluctuate year to year but usually run 20–35% of applicants selected. Lottery losers are refunded.

How many people finish the Leadville 100?

Roughly 1,500–1,800 riders start each year. Finish rate typically falls between 60% and 70% — approximately 900–1,200 finishers depending on weather. Roughly 15–20% of finishers earn the sub-9 Big Buckle.

What is the elevation profile of the Leadville 100?

The race starts at 10,152 ft in Leadville, climbs St. Kevin's (11,120 ft), Sugarloaf Pass (11,071 ft), and Columbine Mine (12,424 ft — the high point), then reverses with Powerline (~11,200 ft) and the Boulevard back to the finish. Total climbing is roughly 12,000 ft (3,650 m) across four major climbs.

Where should I stay for the Leadville 100?

Leadville itself has limited lodging that books 6–12 months in advance. Common alternatives: Copper Mountain (25 min, elevation 9,700 ft), Frisco (35 min, 9,100 ft), Vail (45 min, 8,150 ft) and Buena Vista (35 min, 7,965 ft). Sleeping at 9,000+ ft aids acclimatization; sleeping in Vail or lower does not.

Which airport is closest to Leadville, CO?

Denver International (DEN) is the primary airport, approximately 2 hours and 15 minutes by car via I-70 west. Colorado Springs (COS) is 2h 45min. Eagle County Regional (EGE) is 90 minutes and closer, but has fewer flights. Rent a car — there is no shuttle service.

What food do the aid stations serve at Leadville?

Official aid stations stock water, GU Roctane drink mix, GU gels, bananas, PB&J quarters, boiled potatoes with salt, pretzels, Coca-Cola and pickle juice at later stations. Any specific brand or item you rely on should be in your drop bag — do not assume.

What is the average speed at the Leadville 100?

A 9-hour finisher averages ~11.5 mph (18.5 km/h); a 12-hour finisher averages ~8.6 mph (13.8 km/h). Elite winners average 15–16 mph (24–26 km/h). Terrain and altitude keep average speed lower than at sea-level 100-mile events.

Can I ride the Leadville 100 on a gravel bike?

Technically yes, and a small number of riders finish on drop-bar gravel bikes with 45–50 mm tires. In practice, the Powerline and Columbine descents plus rocky singletrack punish a gravel setup. An XC hardtail or 100 mm full-suspension bike is faster, safer, and less costly to your body.

How do I prevent altitude sickness at Leadville?

Arrive 7–14 days early to acclimatize, or within 24 hours of the start so the acute response is minimal. Sleep at 9,000+ ft, hydrate aggressively, avoid alcohol race week, moderate first-day intensity, and consider a ferritin check 10–12 weeks out. Discuss prophylactic acetazolamide with a physician if you are prone to AMS.

What are the sub-9 split times at Leadville?

A typical sub-9 pacing plan hits Pipeline outbound in ~1h 50min, Twin Lakes outbound in ~2h 50min, Columbine turnaround in ~4h 30min, Twin Lakes inbound in ~5h 45min, and Powerline base in ~7h 30min — leaving 1h 30min for Powerline, Sugarloaf and the Boulevard.

How do I carb load for the Leadville 100?

For 2–3 days before the race, target 8–10 g of carbohydrate per kg of body mass per day from familiar low-fiber sources: rice, pasta, potato, bread, sports drinks. Reduce fat and fiber, keep protein moderate, and hydrate steadily with sodium.

What is the Leadville Qualifier Series?

The Qualifier Series is a group of MTB and gravel races (Silver Rush 50, Austin Rattler, Marji Gesick, Tatanka, Wilmington, Barn Burner and others) whose top finishers earn guaranteed entry to the Leadville 100 MTB. Slot depth varies by race and gender category — check each event's Athlete Guide.

Is the Leadville 100 MTB worth the money?

For many amateur MTB athletes it is a bucket-list event: elite production, iconic Colorado terrain, a real challenge, and a strong finisher culture. For riders who want a similar experience at lower cost, Silver Rush 50, Firecracker 50 or Breck Epic are strong alternatives.

How do I train for Leadville if I live at sea level?

Build aerobic volume aggressively (12–16 hours/week for 8–12 weeks), do 1–2 threshold sessions weekly, add heat exposure (10–14 sessions late in the build) to boost plasma volume, and arrive at altitude either 10+ days early or within 24 hours of the start. Riders who arrive 3–7 days out typically underperform.

What is a good Leadville 100 MTB training plan?

A realistic Leadville 100 MTB training plan runs 16–24 weeks and hits three targets in parallel: aerobic volume (peak 12–16 hours/week for 8–12 weeks), threshold work (weekly 2× 20 min or 4× 10 min at 90–100% FTP) and altitude readiness (3–4 weeks of on-site acclimatization or a fast-arrival strategy). Long rides progress toward 5–7 hours with 6,000–10,000 ft of climbing. A 2-week taper with race-effort openers finishes the block.

Where can I download the Leadville 100 MTB course map or GPX file?

The official route is published each year by Life Time / Leadville Race Series on the event website (leadvilleraceseries.com) shortly before race week. Third-party GPX files circulate on Strava, RideWithGPS and Trailforks, but only the official Athlete Guide map counts on race day. FuelQ Pro publishes a course elevation profile and turn-by-turn nutrition overlay in the fueling guide section for each edition.

Can I defer my Leadville Trail 100 MTB entry?

Deferral policy is set year-by-year by Life Time. Historically, a limited one-year deferral is available for documented medical or family reasons, requested by a published deadline (typically 30–45 days pre-race) and subject to a deferral fee. Always confirm the current-year policy on the official event site — informal or late-request deferrals are not granted.

Is the Leadville Trail 100 MTB the same as the Leadville Stage Race?

No. The Leadville Trail 100 MTB is a single-day, point-to-point 103-mile mountain bike race held on the second Saturday of August. The Leadville Stage Race is a separate three-day event held earlier in the summer (typically July) that lets riders sample sections of the 100 course. Finishing the Stage Race does not grant entry into the Trail 100.

Leadville Trail 100 MTB Weather & Conditions — What to Expect on Race Day

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Weather & conditions at Leadville 100

Leadville Trail 100 MTB runs in second saturday of august in Leadville, Colorado, USA. Course conditions and weather variability directly change how much you need to drink, how much sodium you lose, and how well you can absorb carbohydrate on the bike.

Altitude
The race starts at 10,152 ft and climbs to 12,424 ft on Columbine Mine. VO₂ max is reduced by roughly 12–16% at this elevation, and gastric emptying slows, making carbohydrate intake harder to tolerate than at sea level.
Weather variability
Start temperatures near freezing are common, with midday highs in the 70s °F and a real chance of afternoon thunderstorms, hail or cold rain on the return over Columbine and Powerline.

Why generic fueling plans don't work for Leadville 100

Two riders on the same start line can need very different fueling. FTP, target finish time, body mass, sweat rate, temperature, altitude adaptation, nutrition products and race goals all change the answer. A generic 60 g/hr recommendation is a starting point, not a plan.

FTP
Finish time
Body weight
Sweat rate
Weather
Products
Goals
Course

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Start with the free checklist

A Race Fueling Plan gives you a personalized strategy for this event. The free checklist helps you prepare the basics first: race-week setup, 48-hour prep, race morning, hydration, sodium, caffeine, aid stations, and backup calories.

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Leadville Trail 100 MTB is complete for this edition.

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Leadville Trail 100 MTB — Weather & Conditions

Leadville Trail 100 MTB is complete for this edition.

Leadville Trail 100 MTB is complete for this edition.

Weather & conditions at Leadville 100

Altitude

Weather variability

Why generic fueling plans don't work for Leadville 100

Download the Printable Leadville Trail 100 MTB Race Guide

Frequently asked questions

Leadville Trail 100 MTB is complete for this edition.

Racing 100 miles? Grab the 100-Mile Fueling Checklist

Leadville Trail 100 MTB is complete for this edition.

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Leadville Trail 100 MTB is complete for this edition.

Leadville MTB Stage Race

Marji Gesick 100

Sertões MTB Ibitipoca

Leadville Trail 100 MTB — Weather & Conditions

Leadville Trail 100 MTB is complete for this edition.

Leadville Trail 100 MTB is complete for this edition.

Weather & conditions at Leadville 100

Altitude

Weather variability

Why generic fueling plans don't work for Leadville 100

Download the Printable Leadville Trail 100 MTB Race Guide

Frequently asked questions

How many carbs per hour for Leadville?

How much water should I drink at Leadville?

How much sodium do I need?

Should I use caffeine?

What should I eat before Leadville?

How do I avoid bonking on Columbine?

How should I fuel the Powerline climb?

How hard is the Leadville Trail 100 MTB?

How long does it take to finish the Leadville 100?

How much climbing is in the Leadville 100?

What is the cutoff for a Big Buckle at Leadville?

What are the intermediate cutoffs at Leadville?

How many aid stations does the Leadville 100 have?

Where can I use drop bags at Leadville?

Hardtail or full suspension for Leadville?

What tire width and pressure for Leadville?

What gearing do I need for Columbine and Powerline?

Is a dropper post worth it at Leadville?

How many weeks should I acclimatize before Leadville?

How much does altitude reduce my power at Leadville?

What should I wear at the Leadville start?

What is the weather like on race day?

How many calories per hour do I need at Leadville?

How do I pace the Columbine climb?

How do I qualify for the Leadville 100?

When is the Leadville 100 MTB in 2026?

How much does it cost to enter the Leadville 100 MTB?

How do I enter the Leadville 100 lottery?

How many people finish the Leadville 100?

What is the elevation profile of the Leadville 100?

Where should I stay for the Leadville 100?

Which airport is closest to Leadville, CO?

What food do the aid stations serve at Leadville?

What is the average speed at the Leadville 100?

Can I ride the Leadville 100 on a gravel bike?

How do I prevent altitude sickness at Leadville?

What are the sub-9 split times at Leadville?

How do I carb load for the Leadville 100?

What is the Leadville Qualifier Series?

Is the Leadville 100 MTB worth the money?

How do I train for Leadville if I live at sea level?

What is a good Leadville 100 MTB training plan?

Where can I download the Leadville 100 MTB course map or GPX file?

Can I defer my Leadville Trail 100 MTB entry?

Is the Leadville Trail 100 MTB the same as the Leadville Stage Race?

Leadville Trail 100 MTB is complete for this edition.

Racing 100 miles? Grab the 100-Mile Fueling Checklist

Leadville Trail 100 MTB is complete for this edition.

Start with the free checklist

Leadville Trail 100 MTB is complete for this edition.

Related race guides

Leadville MTB Stage Race

Marji Gesick 100

Sertões MTB Ibitipoca