Unseen Threats on the Appalachian Trail: How to Handle the Bug Menace

Bugs can ruin an Appalachian Trail hike. Ticks, mosquitoes, flies and more await hikers. Learn how to battle bloodsuckers and protect your health on the AT.

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Josh Koop

I live with my wife and daughter in Katy, Texas and my local trail is the Lone Star Hiking Trail which is an amazing way to experience the Sam Houston National Park!

close up of a mosquito on a finger
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Many people believe that the Appalachian Trail is a great place to escape civilization and enjoy nature.

What many don’t know about all of the different species of bugs that live there, is many types of insects live on this trail, and they’re not all harmless!

Today, we dig into how bad are bugs on the Appalachian Trail and how to prepare for your health and mental status!

Bugs can be a big nuisance on the trail based on the time of year, the most common are ticks, followed by biters like mosquitoes and black flies. The biggest worry for the AT is the ticks and Lyme Disease, at 30-40,000 cases a year, with most cases coming from the states the AT runs through.

While this can make some nervous about hiking, thousands of hikers have been on the trail each year with only a few cases.

It is still recommended to check yourself thoroughly at mid-day and after the end of. the hiking day to ensure no ticks are in your hair or clothes!

Hiker Core Concern – Ticks and Lyme Disease Risk

The biggest bug issue for a thru-hiker will be focusing on Appalachian Trail ticks, which are very small and challenging to see. Checking for these at a minimum, once a day, using tick tweezers or other fine-tipped hemostats is recommended.

The ones that often cause Lyme Disease will have black legs but there are other types as well so it’s necessary to double-check every time before grabbing one.

If possible, inspect your clothes after any water crossings near tall grasses where they’re more prevalent since they love moist areas.

If bitten by a tick, remove it within 24 hours or head into town immediately because antibiotic treatment works best when started soon after infection.

You’ll notice redness around the bite area and flu-like symptoms like fever, chills, and aches.

It is also possible to get a skin rash that can spread from the site of the bite up to six inches in diameter called erythema migrans which will appear within one week after infection!

This should be treated with antibiotics immediately if spotted since it spreads easily and slows down your journey on the trail.

Additional Hiking Pests – Frustration and Irritation

While ticks are the primary concern , there are many other hiking trail pests on the trail that can cause problems. The most common are mosquitoes and black flies, which will swarm in moist or shaded areas.

These pests can be worse at certain times when there is more water on the trail from snowmelt or rainstorms.


Mosquitos are a pretty location-dependent bug. They are only bad if you happen to camp near a pond or stagnant (standing) water.

This is probably most people’s absolute worst fear on the trail, requiring constant vigilance and frequent application of DEET or another chemical repellent to keep them at bay.

Most hikers will spray their clothes with bug-repellent as well for added protection but it isn’t guaranteed that this is effective since they can bite through clothing if hungry enough!

If you do get bit there are a few home remedies such as tea tree oil which might provide relief from itching and swelling.

Black Flies

The black fly doesn’t carry diseases like mosquitoes so it’s more about the annoyance than anything else, especially in mid-summer when these pests come out full force along wet trails.

Again, don’t forget your insecticide sprays even though most won’t cover this specific bug.

Bees / Hornets / Yellow Jackets

For those who are allergic or not, many stinging insects can be life-threatening, especially for those out in the wilderness with no way to get medical help.

If you do get stung there is an antihistamine like Benadryl that may provide some relief but little else works and it’s important not to rub or scratch since this will just spread venom through your body!

Make sure if you are allergic that you carry the necessary medications with you to halt an allergic reaction ASAP!

Gnats / No-See-Ums

I can say that these are probably the most annoying of all bugs on the trail, especially in July and August when they are at their peak.

These tiny black or clear insects can make hiking unbearable since they’re usually around your face with constant buzzing sounds to annoy you even more!

Some hikers will try wearing a head net but this is miserable if it’s warm out, so instead, just bring some bug spray that contains DEET for increased protection.

You’ll want to reapply every few hours during heavy bug seasons like June-August along high trails where there are moist shaded areas near water sources.


These are severe little bugs that are most common from May to July, depending on the year, and can be extremely stubborn to remove since their bite is so small.

If you wear shorts, as I prefer, the chiggers can be the worst. Find and rub up against the perfect grass or brush, and you’ll think you have a heat rash.

But it’s actually those little bastards burrowing into your skin. In the mid-Atlantic states, you’re most likely to come across chiggers.

If they have burrowed under your skin, try not to scratch as much as possible since it could lead to infection; instead, use antiseptic creams like Neosporin for faster healing times.

How To Fend Off Bugs – Tips for Safety and Sanity

The simplest way to repel mosquitoes while hiking is to spray permethrin or other bug repellent onto your clothing and gear.

Since these pests can be everywhere on AT, it’s best to always carry at least one bottle of bug spray with DEET. This will usually be enough protection unless there are almost no other hikers when camping near ponds or swamps.

Another thing I recommend is wearing long pants and sleeves if you don’t want to be attacked since mosquitoes commonly attack exposed skin!

Finally, make sure not to over-exert yourself when hiking, especially during humid days when bugs tend to thrive most due to the heat.

Final Thoughts on How Bad are Bugs on the Appalachian Trail

Bugs are a common annoyance on the Appalachian Trail. Though they can be annoying, most of these pests do not carry diseases and will usually only leave you with an itchy bump or two if bitten many times in one day.

If you’re allergic to stinging insects like bees or hornets, however, bugs could potentially cause life-threatening reactions that require medical attention.

To stay safe from bugs as much as possible, wear long sleeves and pants when hiking during humid days where mosquitoes thrive most due to heat exposure.

Make sure to use insecticide sprays for extra protection against pesky black flies and gnats near water sources, and always bring bug repellent containing DEET along your hike for increased coverage of high trails which have moist shaded areas nearby.

Lastly, embrace the suck and never quit on a bad day!

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