I’ve watched a lot of November championship races from the sideline. The athletes who surge over the last half-mile while everyone else is hanging on? They didn’t find something extra on race day. They built it — starting nine months earlier, in the gray, cold weeks that look an awful lot like right now.

It’s March 1st. Spring track is underway or about to be. Invitationals are being circled on calendars. Times from last fall are already being used as benchmarks for this spring. That’s all fine — track matters, and racing track well is part of the plan.

But here’s what separates good runners from championship runners: the best ones understand that March is not just the start of spring track. It’s the earliest viable starting line for the fall XC championship season. And the window is narrow. Get it right and you walk into August with a legitimate aerobic engine. Get it wrong — grind through spring on pure intensity and skip the foundational work — and you’re building your fall season on sand.

Let me explain what’s actually happening inside your body right now, why it matters for November, and exactly what to do about it.

The Physiology: What’s Actually Happening in Your Body

Here’s the problem with track-only thinking in March: the energy systems you’re training for the 800 and the 1600 are not the same systems that will carry you through a 5K cross country championship nine months from now.

Track racing, particularly anything from the 800 to the mile, demands a significant anaerobic contribution. You’re racing in oxygen debt and the lactate buildup is turning your legs to cement. That’s fine — it’s what the event requires. But repeated hard anaerobic efforts without a massive aerobic foundation to recover on is a recipe for stagnation. More importantly, the physiological adaptations that define long-term XC performance take months or even years — not weeks — to develop.

The Dual-Season Challenge — And Why Most Runners Botch It

The honest challenge of being a serious high school distance runner is this: you have two seasons that both demand your best. Spring track is real. Times matter. Scholarships are on the line for some of you. I’m not going to tell you to sand-bag your track season for the sake of November.

But I’ll tell you what I’ve observed coaching for over 25 years: the runners who crush both seasons share one trait. They never fully let go of the long game. Distance runners endure.

Here’s the physiological conflict you’re navigating. Track racing — especially the 800, and the mile — requires sharpness, anaerobic capacity, and race-specific speed. That means interval work, race-pace efforts, and a degree of accumulated fatigue that legitimately limits how much aerobic volume you can layer on top. This is not a flaw in the system. It’s just periodization reality.

The solution is not to choose track or XC. The solution is structural. You need a plan that treats the next six months as a single, continuous macrocycle — with spring track as a sharpening phase and the summer as the long aerobic build that your November championship is funded by. Translation: Go crush it on the track this season, but take the longer summer miles easy.

The March Framework: Four Things to Do Right Now

1. Calibrate Your Training Paces With Race Data — Not Ego

The first and most critical step is this: stop training by feel and start training by data. If you raced this winter — an indoor mile, a 5K road race, anything — you have actionable data right now. Plug that time into a VDOT calculator and recalibrate your easy, threshold, and interval paces.

This is not optional. A threshold run done too fast is a race. A threshold run done too slow is junk mileage. The margin between those two outcomes is small, and you cannot eyeball it reliably. What feels “comfortably hard” after a winter of lower mileage is almost certainly faster than your actual threshold — meaning you’re accumulating fatigue without the adaptation you’re looking for. Threshold begins at 82-85% of your vVO2max. It’s slower and easier than you might guess on your own.

Use your most recent race performance to set your training zones, and trust those numbers. Easy days should be genuinely easy. Threshold days should be legitimately threshold. Use the free Training Pace Calculator at CoachSaltmarsh.com — it’s calibrated for high school 1-mile and 5K performances and gives you exact paces for every type of run. Don’t use goal paces, use realistic paces when entering times.

2. Structure Your Mileage Increases Conservatively — But Start Now

The classic injury trap in March is the weather getting nicer and the mileage jumping with it. Don’t do too much too soon. The 10% rule is a minimum of caution, not a goal. Shin splints, stress reactions, IT band issues — these are almost always the result of mileage spiking too fast on legs that aren’t structurally prepared.

The smarter move is to map out your mileage progression from now through the end of summer, and let the spring track season inform — but not dominate — that map. On weeks with multiple hard track workouts, the long run gets shorter or easier. On lighter track weeks, you push the aerobic volume. It’s a balancing act, but it’s a knowable one if you plan in advance.

The Mileage Progression Calculator at CoachSaltmarsh.com lets you model this out week by week. Build your summer plan now, before the track schedule consumes your mental bandwidth in April and May.

3. Don’t Wait Until July to Think About Heat

Here’s something most runners don’t consider until they’re already suffering: Springtime in New Hampshire — and across most of the country — already presents meaningful physiological challenges around heat and hydration by mid to late season. Temperature swings of 30 degrees between morning practices and afternoon meets are common. A runner who logs an easy 8 miles at 52°F on Tuesday and then logs an easy 8 miles in 78°F sunshine on Friday is dealing with a meaningfully different physiological environment — and their effort calibration should reflect that.

The habit of monitoring environmental conditions and adjusting effort accordingly is one that pays the biggest dividends in July and August, when heat-related performance decrements become serious. But the habit needs to be built now. Use the Heat Adjust and Rehydration tools at CoachSaltmarsh.com — not when it gets hot, but as a year-round discipline.

4. Map Your Summer Plan Before Track Season Ends

This is the most underrated advice I give every year, and the coaches who follow it consistently produce better fall runners: build your summer mileage plan in March, when you still have the mental space to do it thoughtfully.

Come May and June, the track schedule is relentless. Invitationals, league championships, state qualifying rounds — there’s no bandwidth left for strategic planning. By the time the last race is run, you have about two weeks before XC preseason camps start. If you haven’t mapped out the summer yet, you’re already behind.

March is the time to use the Build My Summer Plan tool to lay out your foundational volume weeks. Know your target summer mileage. Know your progression rate. Know which weeks will be down-weeks and which will push the ceiling. That clarity will guide every decision you make from now through August.

What the Periodization Actually Looks Like

Here’s how I frame the next six months for the serious XC contender. This is adapted from the Lydiard–Vigil model of periodization — sequential development of physiological capacities, with each phase building on the last.

Notice what’s present in every single phase: aerobic volume is never abandoned. Even at peak track intensity in April and May, the long run is protected. Even in the heart of championship racing in October, easy days are genuinely easy. The athletes who understand this are the ones who don’t fall apart at the end of XC season — because they never let the foundation erode.

The Bottom Line

Every serious runner on your team has the same November championship on their calendar. Most of them aren’t thinking about it right now — they’re thinking about the next track invitational, which is exactly where their focus should be on race day.

But between now and race day? The work you do — or don’t do — in March determines whether you’re surging at mile 2.9 in November or just trying to hang on.

Start with data. Get your training paces calibrated. Map your summer. Protect the foundation. That’s the job right now.

The clock is already running.