5 Mistakes Every First-Time Runner Makes (And How to Avoid Them)

Your first few races can be one of the most exciting — and steepest learning experiences — you’ll ever have as a runner. The truth is, most first‑time runners make the same handful of mistakes. And those mistakes can turn a fun race into a real struggle, or even stop you from finishing.

In this guide, I’m breaking down the five biggest mistakes new runners make, whether you’re training for your first marathon, trail race, or ultra. More importantly, I’ll show you exactly how to avoid them so you can actually enjoy the day.

Mistake 1: Starting at the Wrong Effort — First-Time Runner Mistakes

One of the most common mistakes first‑time runners make is starting far too hard. The excitement, the crowd, the fresh legs — it all pushes you into running at an intensity you simply can’t sustain.

If the early miles feel like “work,” you’re burning matches you’ll desperately want later.

How to Fix It

• Start at Easy‑Plus: comfortable, controlled, smooth.

• Use a breathing check: if you can’t hold a light conversation, you’re too high on the effort scale.

• Run your own effort: let people surge past early. You’ll catch many of them later without increasing your effort at all.

  
  

Mistake 2: Not Fuelling or Hydrating Properly

Many new runners skip eating or drinking early in the race. For anything over an hour, that’s a problem. Your energy doesn’t fade gradually — it drops suddenly.

How to Fix It

• Plan your strategy: going in blind is asking for trouble.

• Fuel early: first gel at 30–40 minutes, then every 30–45 minutes.

• Sip regularly: avoid big gulps at aid stations.

• Train your gut: your stomach needs practice just like your legs.

• Know the aid stations: check what’s available and where before race day.

  
  

Mistake 3: Thinking You Have to Run Nonstop

A lot of first‑time runners think walking is failure. It’s not. Walking — especially on hills or technical terrain — is a smart energy‑management strategy that saves your legs and doesn’t cost much time.

How to Fix It

• Use the classic trail rule: run the flats, hike the climbs.

• Try planned walk breaks: e.g., 1 minute walking every 10 minutes running.

• Practice hiking in training: strong hiking is a superpower in longer races.

• Keep effort consistent: avoid big spikes that drain your energy.

  
  

Mistake 4: Trying New Gear on Race Day

Race day is not the time to experiment. New shoes, socks, gels, or hydration systems can cause blisters, stomach issues, or general misery.

How to Fix It

• Do full dress rehearsals: long runs in your exact race‑day kit.

• Check your pack fit: a bouncing vest wastes energy and causes chafing.

• Use anti‑chafe: even if you think you don’t need it.

• Lay everything out the night before: avoid last‑minute swaps.

  
  

Mistake 5: Not Respecting the Challenge

One of the biggest mistakes first‑time runners make is not fully respecting the challenge ahead. Even shorter races can feel surprisingly tough when nerves, terrain, weather, and pacing all come into play.

Races demand patience, focus, and emotional resilience — and if you don’t prepare for that, the day can hit harder than expected.

How to Fix It

• Acknowledge the difficulty: no race is “just” a marathon or “just” a 50k.

• Break the race into chunks: aid station to aid station, mile to mile.

• Have a mantra: something grounding like “keep moving forward.”

• Expect low points: they’re normal, and they pass.

  
  

Bonus: What to Do in the Days Before Your Race

What you do before the start line matters.

Pre‑Race Checklist

• Make small adjustments to your food intake — slightly more carbs, slightly fewer fats and proteins.

• Stay off your feet — light walking only.

• Prep your kit — lay everything out and pack your bag.

• Know your logistics — parking, toilets, bag drop, cut offs.

  
  

Bonus: What to Do Right After You Finish

Help your body recover quickly with a few simple steps.

Post‑Race Checklist

• Keep moving for 3–5 minutes to let your body settle.

• Put on a warm layer — even if you feel hot.

• Eat something small — whatever you practiced in training.

• Celebrate — you earned it.

  
  

Final Thoughts

If you avoid these five mistakes — and follow the simple effort‑based tips above — your first race, whether it’s a short trail event, half marathon, marathon, or ultra, will be far more enjoyable and far more successful.

If you’re preparing for your first race and want support with pacing, fuelling, or training structure, feel free to reach out. As an ultra running coach, I help runners of all levels build confidence, resilience, and race‑day readiness.