Leadville Trail 100 Training Plan: Conquer Colorado's Most Iconic Mountain Ultra
Master the 161km route with 4,800m of elevation gain across alpine terrain. This comprehensive guide covers everything from altitude acclimatization to the double crossing of Hope Pass.
161km
4,800m D+
Colorado, United States
Mid-August
Understanding the Leadville Trail 100 Course
The Leadville Trail 100 is the crown jewel of American ultramarathons, a 161km point-to-point mountain race through the Colorado Rockies starting and finishing at Leadville's high altitude of 3,094m. What makes this race uniquely challenging isn't just the distance—it's the relentless elevation profile with 4,800m of elevation gain traversing terrain above 3,000m for nearly the entire event. Runners will summit Hope Pass twice (at 3,869m), cross multiple 12,000-13,000 foot ridges, and navigate technical single-track trail through aspen groves, alpine meadows, and exposed mountain passes. The race typically takes place in mid-August when mountain weather is most stable, though afternoon thunderstorms remain a genuine hazard. With 12 strategically placed aid stations and a 30-hour cutoff, pacing discipline and mental resilience are as critical as physical preparation. The terrain transitions from runnable trail to steep climbing to technical descents, requiring a versatile skill set and meticulous course knowledge.
Route exceeds 12,000ft elevation multiple times with sustained high-altitude exposure
Hope Pass appears twice during the race, creating psychological and physical tests
12 aid stations are your lifeline—know which ones are crew-accessible for strategy
Terrain varies from exposed ridgelines to forested single-track requiring technical footwork
30-hour cutoff demands consistent pacing; stopping for more than a few minutes at aid stations costs valuable time
Leadville Trail 100 Training Plan Overview
A 20-week training plan designed specifically for the demands of Leadville Trail 100.
Base Building Phase
5 weeks
Establish aerobic foundation with long, steady trail running while introducing altitude training. Build weekly volume to 80-100km and practice hiking on steep grades.
Peak: 100km/week
Strength & Speed Phase
4 weeks
Incorporate hill repeats, tempo runs, and strength training focused on quadriceps resilience. Add VO2 max work through interval sessions on varied terrain.
Peak: 110km/week
Leadville-Specific Phase
7 weeks
Long-run strategy training with emphasis on back-to-back run-hike days, altitude exposure, and multi-day fatigue adaptation. Practice fueling and pacing at low intensities for extended periods.
Peak: 130km/week
Taper & Peak
4 weeks
Reduce volume by 40-50% while maintaining intensity through short, sharp efforts. Focus on recovery, course visualization, and logistical preparation.
Peak: 70km/week
Key Workouts
01Back-to-back 30-40km long runs with 2,000m+ elevation gain simulating race fatigue
02Hope Pass repeats: 8-10km climbs at goal race effort with 500m elevation gain
03Altitude-specific training at 2,400m+ elevation for 2-3 weeks before the race
04Run-hike intervals: 10x(5min hard effort + 5min hike recovery) on steep terrain
05Technical footwork drills on rocky, rooty single-track at sub-threshold intensity
06Midnight training runs (6-8 hours) to practice nighttime navigation and fueling
07Multi-pitch hill repeats (6-8x 20min climbs with 5min recovery) at 90% aerobic threshold
08Night navigation practice on familiar trails with headlamp to build confidence for dark hours
Get a fully personalized Leadville Trail 100 training plan tailored to your fitness, schedule, and goals.
Leadville Trail 100 Race Day Tips
1Start conservatively for the first 30km—the altitude will tax your system, and the race is won by who's running strongest at km 130
2Master the art of power-hiking steep sections rather than attempting to run them; running uphill above 3,600m burns glycogen and destroys morale
3Establish a rigid fueling schedule at each aid station (every 60-90 minutes) to prevent bonking mid-race; never skip calories thinking you're not hungry
4Bring layers for all conditions—afternoon thunderstorms can drop temperatures 20°F rapidly; stay dry to prevent hypothermia on exposed ridges
5Practice your night running strategy in training; use a quality headlamp and pre-plan your pacing for darkness (typically 8-10 hours in August)
6Study Hope Pass before race day; know the descent is extremely technical—practice controlled downhill technique on similar terrain
7Use compression socks or calf sleeves for the entire race to reduce quad fatigue and improve blood flow at altitude
8Manage crew logistics carefully; only certain aid stations allow crew access—coordinate with your support team on which stations they'll staff
9Treat every aid station like a pit stop: sit for 2-3 minutes only, consume specific calories (target 300-400 calories per hour), and move on
10Remember the 30-hour cutoff is real; if you reach mid-race aid stations significantly behind pace, adjust your strategy or plan to DNF rather than suffer a time-cut
11Document your pacing per segment in training—know what pace requires walking vs. running on each terrain type to hit splits accurately
12 Stay mentally focused on the next aid station, not the entire race; breaking the 161km into 12-15km segments makes the mental load manageable
Essential Gear for Leadville Trail 100
Trail running shoes with aggressive tread and reinforced toe box rated for technical terrain and scree
Lightweight backpack (8-12L) with hydration reservoir to carry nutrition, layers, and navigation tools
Waterproof shell jacket and insulating mid-layer (fleece or down) for rapid weather changes above 12,000ft
Compression socks or calf sleeves worn for the entire race to combat altitude-induced fluid shifts
Dual headlamps (primary and backup) with fresh batteries—darkness lasts 8+ hours at Leadville altitude
Handheld water bottle (600ml) if crew support is limited; establish clear hydration strategy at each aid station
Merino wool base layer and technical long tights (not cotton) for temperature regulation and chafing prevention
Hat with visor for sun protection and insulation; consider a beanie in backpack for descents and night running
Gaiters to prevent trail debris entry into shoes on technical, rocky sections
Trekking poles for all climbing and technical descents—non-negotiable for efficiency and knee preservation
Trail-specific fuel with proven stomach tolerance at altitude: bars, gels, electrolyte drinks tested extensively
Blister kit (Leukotape, antibiotic ointment, and foam padding) for the 161km distance regardless of shoe fit
Anti-chafe products (Body Glide or similar) for groin, feet, and any blister-prone areas
Frequently Asked Questions
What's the best altitude acclimatization strategy for Leadville Trail 100?
Plan to arrive at Leadville (10,152ft) at least 3-5 days before the race. Spend the first 2-3 days at reduced activity levels, hydrating aggressively and eating well to allow your hemoglobin levels to stabilize. If possible, train at 2,400m+ elevation for 2-3 weeks before the race to improve your red blood cell production. On race week, avoid hard efforts—keep runs easy and focus on sleep, hydration, and carbohydrate loading. The goal is adaptation without training stress.
How many calories should I consume per hour during Leadville Trail 100?
Target 300-400 calories per hour depending on your body weight and intensity. At altitude and running 20-30 hours, your digestive system becomes finicky—stick to simple carbohydrates and electrolytes rather than fat-heavy foods. Practice your exact nutrition plan in training at similar intensities and altitudes. Most successful runners consume a mix of gels, bars, electrolyte drinks, and aid station offerings (soup, broth, sandwiches). Never experiment with new products on race day.
What pace should I aim for on Leadville Trail 100?
Most finishers maintain an overall pace of 6:30-8:00min/km when accounting for walk breaks on climbs. However, pace is terrain-dependent: expect 5:00-6:00min/km on runnable descents, 8:00-10:00min/km on steep climbs, and 7:00-9:00min/km on rolling terrain. The key is knowing YOUR baseline paces on similar terrain at sea level, then factoring in 30-50% slowdown due to altitude and fatigue. Practice pacing discipline in training on back-to-back long days.
How do I train for Hope Pass when I don't live near high mountains?
Replicate the Hope Pass experience with back-to-back 8-10km climbs totaling 500m+ elevation gain in a single session. If mountain terrain isn't available, use sustained hill repeats on road or stair climbing. The psychological component is equally important—visualize summiting Hope Pass twice and practice the mental strategies you'll use (mantras, music, mantras, etc.). Run the course virtually using trail running apps to familiarize yourself with the route and terrain type.
What's the cutoff time at each aid station, and how do I avoid missing time limits?
Check the official Leadville Race Series website at https://www.leadvilleraceseries.com for the most current cutoff times—they are adjusted annually based on race conditions. Generally, cutoffs become progressively tighter through mid-race aid stations and lenient in the final 40km to ensure finishers cross within the 30-hour window. Track your pace per segment in training and know what time you should reach each major aid station. Build in a 15-20 minute buffer to account for fatigue affecting your speed in the second half.
Should I run or hike Hope Pass, and what's the best strategy?
Most elite runners hike most or all of Hope Pass's 500m elevation gain—attempting to run at altitude above 3,600m is inefficient. Your heart rate will spike, your glycogen will burn faster, and you risk altitude sickness. Practice power-hiking steep grades with poles in training to build confidence. The descent is extremely technical and rocky—many runners walk it too to preserve their quads for the remaining 70km. Treat Hope Pass as a mental milestone rather than a place to make time; losing 5 minutes there to preserve energy costs you nothing over the full race.
How important is crew support for Leadville Trail 100?
Crew support significantly improves your chances of finishing strong, but it's not mandatory. Only certain aid stations allow crew access; check the official race website for crew-accessible locations. A crew can provide fresh bottles, custom nutrition, emotional support, and navigation reminders that keep you focused. However, many runners finish without crews by running self-supported with carefully packed backpacks. If you have crew, establish clear protocols: specific calories at specific stations, no long conversations, and focus on efficiency.
What's the best headlamp setup for the night portion of Leadville Trail 100?
Carry two headlamps (primary and backup) with fresh batteries or full charge. Most runners at Leadville experience 8-10 hours of darkness, potentially from around 9 PM to 5 AM depending on your pace. Choose a lamp with at least 200 lumens for navigating technical terrain safely. Practice night running on your regular training trails to build confidence and determine what brightness level you prefer. Many runners also pre-identify landmarks along the course that they'll recognize by headlamp to prevent navigation errors.
How do I prevent altitude sickness on Leadville Trail 100?
The race maintains altitude above 3,000m throughout, but acute altitude sickness is rare if you arrive 3-5 days early and acclimatize. Prevent it by: (1) hydrating aggressively—drink 500-750ml per hour on race day; (2) eating carbohydrates to improve oxygen utilization; (3) maintaining a conservative pace early to avoid oxygen debt; (4) avoiding alcohol the days before the race. If you experience severe headache, nausea, or dizziness, notify an aid station volunteer and consider slowing dramatically or withdrawing. Most runners manage altitude effects through proper pacing and hydration rather than supplements.
What's the terrain like on Leadville Trail 100, and how should I train for it?
Terrain varies dramatically: 40% sustained climbing on steep grades, 30% technical single-track through forests and across scree fields, 20% rolling alpine terrain, and 10% downhill sections. Single-track is rocky, rooty, and technical—practice footwork drills on similar terrain. Scree fields require concentration to avoid ankle injuries. Descents are steep and rocky, demanding quad strength and technical control. In training, seek out varied terrain: mountains, foothills, and technical trails. Run-hike intervals on steep sections build power and mental resilience for race-day reality.
How do I balance training volume with recovery when preparing for Leadville Trail 100?
Peak weeks should reach 130km but include only 1-2 hard efforts; the majority should be easy, conversational-pace running. Ultra training prioritizes time on feet over speed work—a 4-hour trail run at easy pace is more valuable than tempo repeats. Include 1-2 complete recovery weeks during your 20-week cycle to prevent overtraining. Sleep 8-9 hours nightly and monitor your resting heart rate (if it's elevated 5+ beats, you're under-recovered). Use foam rolling, stretching, and mobility work daily. Consider working with UltraCoach to customize your training based on your fitness level and respond dynamically to fatigue patterns throughout your build cycle.
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