Methods for Getting Rid of Annoying Horse Flies

Quick answer

• Fly spray is your first line of defense. Use one with DEET or Picaridin.
• Wear light-colored, loose-fitting clothing. It makes it harder for them to land.
• Use fans in camp areas. Moving air disrupts their flight.
• Consider fly traps. They can reduce the local population.
• Keep food sealed. Attractants draw them in.
• Know your water sources. Horse flies breed near water.
• Be patient. They’re part of the outdoor experience sometimes.

For an effective defense against horse flies, consider a Picaridin bug spray. It’s a great alternative to DEET.

What to check first (do this before you drive out)

Before you even think about packing the car, get a lay of the land. Horse flies are a nuisance, but knowing where they thrive and how to manage them is key to a peaceful trip.

• Land manager / legality: Who’s in charge here? Is it US Forest Service, BLM, a state park? They’ll have specific rules about camping, fires, and sometimes even pest control measures. Always check their official website or give them a call. Ignorance ain’t bliss when it comes to breaking regulations.

• Access/road conditions: Can your rig actually get there? Some backroads are fine for your Subaru, others need 4WD and high clearance. Mud, snow, or washouts can make a trip a non-starter. Don’t be the guy who gets stuck miles from anywhere.

• Fire restrictions + weather + wind: This is a biggie. Drought means fire bans, no exceptions. Check the forecast religiously. High winds can make camping miserable and dangerous, and they can also affect how flies behave.

• Water plan + waste plan (Leave No Trace): Where are you getting your water? Is it potable or do you need to filter/treat it? And what about trash? Pack it in, pack it out. Leave No Trace principles are non-negotiable. Horse flies are often found near water, so knowing that helps you pick a spot.

• Safety (wildlife, distance to help, comms): Are there bears? Moose? What’s the general wildlife situation? How far are you from the nearest ranger station or town? Cell service is spotty in the backcountry. Let someone know your itinerary.

Step-by-step (field workflow)

Okay, you’re at the campsite. The sun’s out, and so are the flies. Here’s how to deal.

1. Assess the fly situation:

• What to do: Take a minute. Are they everywhere, or just a few scouts? Are they actively biting, or just buzzing around?
• What “good” looks like: You can make a reasonable assessment without getting swarmed.
• Common mistake: Panicking and immediately dousing yourself in chemicals without knowing the scale of the problem.

2. Apply personal repellent:

• What to do: Use a repellent with DEET, Picaridin, or oil of lemon eucalyptus. Apply to exposed skin and clothing.
• What “good” looks like: You feel protected and the flies are keeping their distance.
• Common mistake: Missing spots, especially around the neck, ears, and ankles. Flies are sneaky.

When applying personal repellent, a Picaridin bug spray is a reliable choice to keep those pesky horse flies at bay.

3. Set up fans (if available):

• What to do: If you have portable fans, set them up around your main camp area, like near your table or seating.
• What “good” looks like: A gentle breeze creates a fly-free zone.
• Common mistake: Pointing fans directly at yourself, which can just blow them around you. Aim to disrupt their flight paths.

4. Manage food and attractants:

• What to do: Keep all food, drinks, and trash sealed in containers or bags when not actively eating. Cook away from your sleeping area.
• What “good” looks like: No lingering food smells drawing flies to your tent.
• Common mistake: Leaving food out “just for a minute” while you grab something else. That minute is fly-o-clock.

5. Wear appropriate clothing:

• What to do: Opt for light-colored, loose-fitting long sleeves and pants. Tuck your shirt into your pants and your pants into your socks if necessary.
• What “good” looks like: Flies have a hard time landing and biting through your gear.
• Common mistake: Wearing dark, tight clothing. It’s like a welcome mat for flies.

6. Set up fly traps (optional):

• What to do: Deploy sticky traps or bait traps away from your immediate living area, downwind if possible.
• What “good” looks like: The traps are catching flies, reducing the overall population.
• Common mistake: Placing traps too close to where you’re hanging out, turning your camp into a fly buffet.

7. Choose your campsite wisely:

• What to do: If possible, pick a spot with natural windbreaks or on higher ground, away from stagnant water sources where flies breed.
• What “good” looks like: A slightly breezier, drier location that’s less attractive to flies.
• Common mistake: Setting up camp right next to a marsh or slow-moving stream. That’s prime fly real estate.

8. Water management and cleanup:

• What to do: Dispose of dishwater and wash water properly, at least 200 feet from water sources. Don’t leave puddles around your site.
• What “good” looks like: Your campsite isn’t creating new breeding grounds.
• Common mistake: Letting dirty dishwater pool near your tent. It’s an open invitation.

9. Monitor and reapply:

• What to do: As the day wears on, check your repellent effectiveness and reapply as needed, especially after sweating or swimming.
• What “good” looks like: You maintain a consistent level of protection.
• Common mistake: Assuming one application lasts all day. It doesn’t.

10. Embrace the outdoors:

• What to do: Sometimes, you just have to accept that bugs are part of nature. Focus on the other awesome parts of camping.
• What “good” looks like: You’re still enjoying your trip despite the minor annoyance.
• Common mistake: Letting flies ruin your entire outing. It’s a bummer, but it’s usually temporary.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Ignoring land manager rules	Fines, being kicked out, damaging the environment.	Always check the official website or call the land manager before you go.
Underestimating road conditions	Getting stuck, vehicle damage, needing rescue.	Research road conditions, know your vehicle’s limits, and have a backup plan.
Disregarding fire restrictions	Wildfires, hefty fines, environmental destruction.	Check current fire restrictions <em>immediately</em> before you leave. Have a backup plan for cooking (e.g., camp stove).
Not packing out all trash	Attracting wildlife, polluting the area, leaving a mess for others.	Pack it in, pack it out. Use sturdy trash bags and double-bag anything that might leak.
Using dark, tight clothing	Making yourself an easy target for biting insects.	Wear light-colored, loose-fitting clothing made of tightly woven fabric.
Applying repellent unevenly	Getting bitten on exposed spots, leading to itching and potential infection.	Cover all exposed skin thoroughly. Reapply as directed, especially after sweating.
Leaving food or trash exposed	Attracting flies and other pests to your campsite, creating a feeding frenzy.	Keep all food, drinks, and garbage sealed in bear-resistant containers or vehicles when not in use.
Setting up camp near stagnant water	Inviting a swarm of biting insects to your doorstep.	Choose campsites on higher ground, with good airflow, and away from marshes or slow-moving water.
Not having a plan for water/waste	Dehydration, illness from contaminated water, polluting campsites.	Bring enough water or a reliable filtration/treatment system. Know LNT principles for waste disposal.
Relying solely on one method	Ineffective protection, still getting bitten.	Use a multi-pronged approach: repellent, clothing, fans, traps, and smart campsite selection.
Not letting anyone know your itinerary	Delayed help in an emergency.	Leave a detailed plan with a trusted friend or family member, including your expected return time.
Forgetting about wind and weather	Uncomfortable or dangerous camping conditions.	Check the forecast for wind, rain, and temperature. Be prepared to adjust plans or turn back if conditions are unsafe.

Decision rules (simple if/then)

• If the land manager has posted specific fly advisories, then pay extra attention to repellent and traps because they know the local conditions.
• If you’re driving on a dirt road and see deep ruts or standing water, then consider turning back or finding an alternative route because you might get stuck.
• If there are red flag warnings or high wind advisories, then postpone your trip or choose a more sheltered location because fires and extreme weather are dangerous.
• If you see signs of bears or other large wildlife, then store food properly and keep a clean camp because attracting them is asking for trouble.
• If you’re camping near a lake or river, then expect more flies and be extra diligent with your repellent and clothing choices because water is where they breed.
• If you’re using a camp stove, then ensure it’s on a level, stable surface because an unstable stove can lead to spills or fires.
• If you feel yourself getting dehydrated, then drink water immediately because dehydration can happen quickly in the outdoors.
• If you plan to swim or get wet, then reapply repellent afterward because water washes it off.
• If you’re in a remote area with no cell service, then carry a satellite communication device because emergencies happen.
• If you notice your repellent isn’t working as well, then reapply it because effectiveness wanes over time.
• If you see a horse fly land on you, then try not to swat it aggressively; instead, calmly brush it off or let your repellent do its job because swatting can just make them more persistent.
• If your primary goal is to avoid flies entirely, then consider camping in drier, windier, or higher elevation areas during peak fly season because flies prefer damp, still conditions.

FAQ

How long do horse flies bite?

Horse flies are most active during the day, especially on warm, sunny days. Their biting activity usually tapers off in the late afternoon and evening, and they are generally inactive at night.

Are horse flies dangerous?

While their bites are painful and can cause itching and swelling, horse flies are not typically dangerous in terms of transmitting serious diseases to humans in the US. However, secondary infections from scratching can occur.

What’s the best way to repel horse flies naturally?

Some people find success with essential oils like citronella, eucalyptus, or peppermint, but their effectiveness is often shorter-lived than DEET or Picaridin. Fans can also help by creating disruptive airflow.

While natural remedies can help, a Picaridin bug spray offers more consistent and long-lasting protection against horse flies.

Do horse flies only bite horses?

No, that’s a common misconception. They are called horse flies because they were historically observed feeding on horses, but they will readily bite other mammals, including humans, cattle, and dogs.

Why are horse flies so aggressive?

Female horse flies need blood meals to produce eggs. They are attracted to movement, dark colors, and carbon dioxide, which makes them persistent hunters.

Can I use bug nets for horse flies?

Yes, fine-mesh head nets and protective clothing are excellent barriers against horse flies. They can make a huge difference in your comfort level when flies are bad.

Where do horse flies lay their eggs?

Horse flies typically lay their eggs in moist or wet environments, such as near the edges of streams, ponds, or marshy areas. The larvae then develop in damp soil or decaying vegetation.

What should I do if a horse fly bite gets infected?

If you notice increasing redness, swelling, warmth, or pus around a bite, seek medical attention. Keep the area clean and avoid scratching.

What this page does NOT cover (and where to go next)

• Detailed identification of specific horse fly species and their unique life cycles. (Next: Research entomology resources for insect identification.)
• Commercial-grade pest control solutions for large areas. (Next: Consult with professional pest management services if needed.)
• Medical treatments for severe allergic reactions to bites. (Next: See a healthcare provider or allergist.)
• Specific campsite reservation systems or fees for national parks or forests. (Next: Visit the official park or forest service website for booking details.)
• Advanced wilderness survival techniques beyond basic safety. (Next: Enroll in a wilderness survival course.)