Most ultrarunners know how to train when they’re rested and feeling fresh. They know how to execute a long run, manage a steady effort and hit fueling targets when fatigue is contained within a single session. What is far less familiar – and far more consequential on race day – is how it feels to move, fuel and make decisions deep into a long ultramarathon, when fatigue has been accumulating for 20, 24 or even 30 hours.
A single long run can teach you a lot. What it cannot replicate is the experience of being 75 miles into a 100-mile race when glycogen is low, appetite is inconsistent and small decisions begin to carry outsized consequences. This is the point in the race when pacing discipline, fueling execution and emotional regulation matter most, yet it is also the hardest state to prepare for in training.
We cannot (and should not) try to fully replicate that level of fatigue outside of race day. The cost is too high, and the margin for error is too small. But we can get closer, intelligently, without assuming too much risk. By stacking large, race-specific efforts across multiple consecutive days, a well-designed training camp allows athletes to approximate the physical and psychological load of late-race fatigue without incurring the same risk.
This is where DIY (do-it-yourself) training “camps” ( 2-3 days filled with long runs) become valuable. When planned intentionally by an athlete or a coach, they offer a way to experience prolonged fatigue, stress-test execution and rehearse decision-making in a controlled environment, close enough to the demands of race day to be informative but far enough away to allow for recovery and adaptation.
The Purpose of a DIY Training Camp
A DIY training camp is not about doing more work for the sake of doing more work, and it should be used sparingly and with intention. It is a deliberate tool designed to address a specific gap in long-distance preparation: the ability to execute well under deep, accumulated fatigue. There is nothing special or magic about it, just a larger, more condensed overload applied at the right time and for the right reasons.
The primary purpose is specificity under cumulative fatigue. Success in long ultramarathons is decided by how well an athlete can regulate effort, fuel consistently and make sound decisions after fatigue has already set in. By concentrating race-relevant training into a short block, athletes can experience this state intentionally while maintaining control over pacing, terrain and recovery.
From a physiological perspective, a training camp increases training density. Stacking long, race-specific efforts across consecutive days places meaningful stress on the musculoskeletal system, connective tissue and peripheral fatigue resistance. These adaptations are particularly important for 100k to 100+ mile events, where durability and tissue tolerance often become limiting factors late in the race. The goal is not to replicate race pace, but to replicate race effort and cost.
They also provide extended opportunities to practice fueling and hydration under realistic conditions. Appetite often fades in ultras, sweetness becomes less appealing after hours of running and small errors carry greater consequence as fatigue builds. Many athletes manage fueling well during isolated long runs but struggle when fatigue stacks. A training camp exposes these challenges early when adjustments can still be made.
Just as important, a DIY training camp functions as a rehearsal environment. It allows athletes to stress-test pacing discipline, gear choices and mental strategies under conditions that closely resemble race demands, without the irreversible consequences of race day. If something feels off, it can be corrected in real time.
Finally, training camps serve an experiential role within a long build. They often introduce novelty – new terrain, new environments or simply a break from routine – which can be motivating late in a training cycle. When planned well, camps become something athletes anticipate rather than endure.
In short, the purpose of a training camp is not to train harder, but to train more specifically. It is an opportunity to practice execution under fatigue, identify gaps and build confidence through experience so that when race day arrives, fewer variables are truly unknown.
Timing and Placement
A training camp only delivers its intended benefit if it is placed correctly within the long-range training plan. For most 100k to 100-mile athletes, the optimal window is approximately five to eight weeks before an “A” race. This timing allows the athlete to absorb the workload, recover fully and carry the adaptations forward into race day.
The concentrated stress of a training camp places a significant load on the musculoskeletal system, connective tissue and peripheral fatigue resistance. While cardiovascular fitness may rebound relatively quickly, these tissues require more time to adapt and recover. Placing the camp too close to race day increases the risk that residual fatigue – not fitness – will show up on the start line.
At the other end of the spectrum, placing a camp too far from race day reduces its relevance. While general fitness may be retained, the specificity of stacked fatigue, extended fueling windows and sustained execution fades as training shifts back toward routine workloads. The athlete becomes fit but less familiar with the demands that define long ultramarathon racing.
The five to eight-week window strikes a balance between these extremes. It allows enough time for fatigue to decay while preserving the specificity of the stimulus. It also creates a natural inflection point in the training cycle, marking the transition from building fitness to refining execution. After the camp, training emphasis shifts away from accumulation and toward absorption, confidence and durability.
What happens before the camp matters just as much as when it occurs. Entering a training camp already fatigued significantly reduces its effectiveness and increases injury risk. Most successful camps are preceded by a short recovery or de-load phase, allowing the athlete to arrive relatively fresh. This improves execution on day one and ensures that fatigue develops as a result of the camp’s structure, not prior overload.
When placed intentionally, a training camp becomes more than a hard weekend. It functions as a critical and defining moment in the training cycle – similar to a supporting “B” race – providing clarity, reassurance and a final opportunity to rehearse the demands of the event well before race day.
Planning and Logistics
The effectiveness of a training camp is shaped by the environment in which it is executed. Without thoughtful planning, it can become unnecessarily stressful and difficult to recover from. With good logistics, it becomes a controlled setting where learning and adaptation can occur.
The first step is recognizing that a training camp is not simply “three big days of running” fit into your normal routine and environment. It is a temporary shift in priorities. For the duration of the camp, training and recovery need to move to the center of the schedule, while work obligations, family logistics and external stressors are intentionally minimized. This almost always requires advanced communication and coordination.
Whenever possible, athletes should plan to step away from work or significantly reduce cognitive load during. Mental fatigue compounds physical fatigue and trying to train at a high level while managing normal life stress undermines both recovery and execution. Even partial disengagement – shortened workdays or delayed responsibilities – can meaningfully improve outcomes.
This planning often extends beyond work. Coordinating a three-day “training vacation” requires communication at home and, at times, diplomacy. I routinely encourage athletes to blame their coach when explaining the plan to a spouse or partner. Saying “my coach says I need to do this” is often far easier than justifying a long weekend away of running on your own behalf. If it reduces background stress, it serves the purpose.
Location choice is another key variable. Ideally, the environment matches the demands of the goal race as closely as possible: terrain, elevation change, footing, climate and technicality. This may involve travel, but it does not require perfection. When exact replication is not feasible, athletes should prioritize the most defining characteristics of the race and accept compromise elsewhere. The goal is relevance, not novelty.
Logistics within that environment matter more than most athletes expect. In one of my own training camps, I underestimated this. A long, race-specific run required multiple water drops, which added hours of driving before and after the session. Forest service road closures forced reroutes, and some roads were impassable given vehicle clearance. What should have been a focused training day became mentally and emotionally taxing.
The running stress was already high. By layering logistical stress on top of it, I compromised recovery and limited how well I could execute the following days. The lesson was simple: stress is cumulative, and the body does not distinguish between physical load and frustration.
Daily logistics should simplify the athlete’s world, not complicate it. Training windows should be clearly defined, with enough space to eat, hydrate, rest and decompress. Meals should be planned rather than improvised. Sleep should be protected. Simple routines – mobility, short walks or quiet time – help regulate stress and prepare for the next session.
True rest between runs is a defining feature of an effective training camp. This is not the time to stay busy or treat downtime as optional. Recovery between sessions is part of what is being trained, and intentional stillness plays an important role.
Fueling logistics also deserve attention. Training camps place extended demands on energy intake, hydration and sodium management. Athletes should ensure adequate food availability, including options that remain palatable as appetite fades. This is not the time for reckless experimentation, but it is an ideal time to confirm what works under prolonged stress. This is the moment you have prepared for – eat all the food.
When planning and logistics are handled well, the training camp becomes more than a demanding block of miles. It becomes a deliberate training environment – one that supports quality execution, meaningful recovery and insight that carries forward into the final weeks of race preparation.
Structure of the Camp
The structure of a training camp should be driven by the demands of the goal race, not by a rigid formula. While common patterns exist, the objective is not to follow a template – it is to create a controlled environment where fatigue accumulates in a race-relevant way.
Most camps are built around two to three consecutive days of running, with three days often providing the best balance between stimulus and recoverability. The defining feature is not the number of days, but the density of training. By stacking longer efforts back-to-back, fatigue carries forward, revealing how pacing, fueling and execution change when recovery is incomplete.
A practical way to scale a training camp is to anchor it to a familiar reference point: a typical mid-week endurance run. This is a steady aerobic session performed consistently during the week – long enough to create fatigue, but repeatable without excessive recovery cost. For many experienced ultrarunners, this falls between 75 and 120 minutes.
For example, if an athlete’s standard mid-week endurance run is 90 minutes, day one of the camp might extend to roughly four times that duration, or about 6 hours. Day two and day three would then scale to approximately two times the reference session, or about 3 hours each. This creates a three-day structure of roughly 6 hours on day one, followed by 3 hours on day two and 3 hours on day three.
This proportional approach keeps the workload individualized rather than arbitrary. Instead of chasing a fixed mileage or time target, the camp is scaled relative to what the athlete is already doing consistently. The longest day creates the primary fatigue stimulus, while the following days compound that fatigue without requiring excessive volume or intensity.
Placing the longest day first serves a specific purpose. Entering the camp relatively fresh allows the athlete to manage effort appropriately on day one and establish a meaningful fatigue baseline. From there, fatigue – not intensity – drives the difficulty of subsequent sessions, which more closely mirrors the experience of a long ultramarathon.
Intensity throughout the camp should remain largely low. Most running is performed at easy aerobic effort, guided primarily by perceived exertion rather than pace or heart rate. As fatigue accumulates, pace becomes less informative, while effort provides more reliable feedback. The goal is steady, sustainable movement rather than testing top-end fitness.
Structure should also reflect race-specific demands beyond duration alone. For mountain races, this may include sustained climbing, long descents, technical terrain or specific vertical gain per mile. For more runnable courses, it may involve extended periods of steady running on similar surfaces. Additional variables – such as pack weight, pole use, night running or environmental exposure – can be layered in selectively based on the athlete’s experience and the race demands.
Variation within the camp should be intentional. Not every session needs to replicate race day in full. One run may emphasize climbing, another descending durability and another fueling execution. Distributing these focus areas across days allows multiple systems to be stressed without overwhelming any single one.
Between runs, recovery becomes part of the structure. Time off the feet, nutrition timing, hydration, sleep and simple mobility work all influence how fatigue carries forward. Athletes who approach recovery with the same intent as the running itself tend to extract far more value from the camp.
A well-designed training camp should leave the athlete fatigued, but functional. Execution should remain intact, even as effort increases. When structured with intent, a DIY training camp provides a practical rehearsal for race-day demands, allowing athletes to practice restraint, reinforce systems under fatigue and gain insight that isolated long runs cannot provide.
What the Camp Teaches You
The most valuable outcomes of a training camp are not immediate fitness gains; they are the insights and the clarity it brings to the final weeks of race preparation.
A well-executed camp shows you how you respond when fatigue is no longer theoretical. You learn what breaks down first, what holds together longer than expected and which strategies remain reliable under stress. Pacing errors surface quickly. Fueling challenges become obvious. Small logistical or recovery issues are magnified. These are not failures – they are pieces of information – and they arrive early enough to correct in future events.
The camp also helps refine expectations. It gives athletes a more honest sense of what sustained effort feels like and what is actually manageable late in a race. This often leads to smarter pacing decisions, more realistic fueling plans, and better judgment about when to stay patient versus when to push.
Just as importantly, a training camp builds confidence grounded in experience rather than optimism. Completing a demanding block provides tangible evidence of what the athlete can handle. Fatigue becomes familiar instead of intimidating, and discomfort is reframed as expected rather than alarming. That familiarity carries forward into race day, when uncertainty is often more costly than fatigue itself.
Perhaps most importantly, a training camp teaches restraint. Success is not defined by how aggressively the first day is executed, but by how well execution is sustained across the entire block. That lesson translates directly to long ultramarathons, where discipline and patience often matter more than fitness alone.