For many runners, hikers, and outdoor athletes, spring through fall is the best part of the year.
Trails open up.
Mileage builds.
Long runs move into the woods.
Gravel routes get longer.
Training shifts off pavement and into places that often feel restorative.
But there is a seasonal risk many athletes underestimate.
Ticks.
And more specifically in the Northeast, the risk of exposure to Lyme disease and other tick-borne illnesses.
The reason this matters is not just infection risk.
It is that athletes may be uniquely likely to miss exposures.
And sometimes uniquely likely to dismiss early symptoms.
I have seen runners attribute unusual fatigue to training load.
Trail athletes blame achiness on long descents.
Endurance athletes interpret brain fog or soreness as under-recovery.
Sometimes those explanations are right.
Sometimes they are not.
And one challenge with tick-borne illness is that the earliest clues can overlap with problems athletes routinely normalize.
That is why awareness matters.
Not alarm.
Awareness.
Because outdoor sport should remain something to enjoy — while respecting the realities of the environment.
Many people assume they would know if a tick bit them.
Often, they do not.
Ticks can be small.
Very small.
Some immature ticks can be easy to miss.
And bites are often painless.
There may be no dramatic moment where someone thinks:
“I just got bitten.”
Which means exposures can go unrecognized.
After a long trail run, people often do one of three things:
That can be a missed opportunity.
Because timing matters.
After hard exercise, attention drops.
People are focused on recovery.
Fueling.
Getting home.
Not doing a methodical tick check.
That is understandable.
But it matters.
Common risk zones include:
That “edge habitat” concept matters.
Sometimes exposure occurs not miles into a run —
but in the first 50 yards.
Or in the parking area.
Or while stretching afterward.
That surprises people.
Even maintained trails can have exposure points.
Especially where vegetation brushes the legs.
And that matters for runners who assume moving fast protects them.
Speed does not prevent contact.
A quick glance is not a true tick check.
Timing matters.
A tick check should happen soon after exposure.
Not hours later if possible.
The sooner the better.
Think methodically.
Check skin.
Check clothing.
Check gear.
Check again after showering.
Pay attention to:
Ticks often favor overlooked places.
That is why systems matter.
Not random checking.
A prompt post-run shower can be more than hygiene.
It can support inspection.
And create a routine cue:
Run.
Shower.
Check.
Repeat.
Simple systems often work best.
This is where performance culture sometimes works against athletes.
People normalize symptoms.
That can delay recognition.
Many people know about the “bullseye rash.”
That can occur.
But not everyone notices one.
And not every rash looks classic.
That is important.
Early symptoms may include:
Those can overlap with hard training.
That does not mean every sore runner should worry about Lyme.
It means context matters.
Be more cautious if symptoms are:
That deserves attention.
Particularly in endemic regions.
This is where athletes have more control than they realize.
Simple measures may help reduce exposure risk.
Examples can include:
Appropriate use of repellents may be part of prevention.
Many athletes underuse this.
Consistency matters more than perfection.
Often the bigger win is routine.
A reliable sequence:
That can prevent missed exposures.
Ticks may also be encountered:
That broader lens matters.
One reason this topic matters in sports medicine is that unresolved illness can sometimes present first as unexplained performance decline.
That does not mean every bad training block is tick-related.
Far from it.
But unexplained fatigue deserves thought.
Comprehensive evaluation is available at Princeton Sports and Family Medicine, P.C., where fatigue or joint symptoms in active people may involve thinking about training load, recovery, biomechanics — and when appropriate, broader medical causes too.
Because athletes can have medical issues.
Not just training problems.
For runners concerned about mechanics or fatigue patterns affecting performance, a Run Stride and Performance Evaluation may sometimes help clarify contributors.
For trail athletes, durability is not only musculoskeletal.
It is environmental readiness too.
That includes:
Some runners support long-term durability through structured work at Fuse Sports Performance or broader exercise support through PSFM Wellness.
But environmental awareness still matters alongside fitness.
Are runners and hikers at risk for Lyme disease?
Yes. Trail runners and hikers may encounter ticks, particularly along wooded or brushy trail edges.
Can you have a tick bite and not know it?
Yes. Tick bites are often painless and may go unnoticed.
Do all Lyme disease cases cause a bullseye rash?
No. A rash may occur, but not everyone notices one.
What symptoms should athletes pay attention to?
Unusual fatigue, unexplained joint pain, flu-like symptoms, or performance decline after possible exposure.
What is the best way to prevent tick exposure?
Clothing strategies, repellents, and reliable post-run tick checks can reduce risk.
Should I worry if I feel tired after a long trail race?
Ordinary fatigue is common. But persistent or unusual symptoms deserve thought.
For runners and hikers in Princeton, Lawrenceville, Hopewell, Pennington, West Windsor, and across Mercer County, tick awareness is especially relevant given regional exposure patterns in the Northeast.
That is not a reason to avoid trails.
It is a reason to be thoughtful.
And prepared.
Consider evaluation if:
A sports medicine or medical evaluation may help determine whether symptoms reflect training load, musculoskeletal issues, or something broader needing attention.
Because sometimes fatigue is just fatigue.
And sometimes it deserves a second look.
You may also find these resources helpful:
This article is for educational purposes only and is not a substitute for medical advice. If you have symptoms concerning for Lyme disease or other illness after tick exposure, seek evaluation from a qualified medical professional.
