Are There Chiggers in Colorado?
Chiggers are very rare in Colorado. The state's high elevation, cooler climate, and lower humidity are unsuitable for chiggers to establish populations. You can safely enjoy Colorado's mountains, forests, and outdoor recreation without concern about chigger bites. Understanding Colorado's outdoor environment helps you prepare for adventures.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Hannemania monticola · Reid Hardin CC BY
- 1
- species recorded
- 1
- GBIF records
- March, April, August
- peak months
Chiggers are rare in Colorado, so you might also want:
Real sighting data, source iNaturalist
Only 3 verified observations on iNaturalist of chigger have been logged in Colorado, which fits how rare they are in the state. That low number is itself the most honest answer to whether you are likely to see one here.
Chiggers are very rare in Colorado. The state's high elevation, cooler climate, and lower humidity are unsuitable for chiggers to establish populations. You can safely enjoy Colorado's mountains, forests, and outdoor recreation without concern about chigger bites. Understanding Colorado's outdoor environment helps you prepare for adventures.
Are They in Colorado?
Chiggers are not established in most of Colorado and are extremely rare in the state. Colorado's high average elevation, cool climate, and relatively low humidity are fundamentally unsuitable for chiggers to survive and reproduce. The vast majority of Colorado lies above 4,000 feet elevation, and most of the state is above 5,000 feet, which is too cool for chigger populations to persist. Chiggers require warm, humid conditions to complete their life cycle, and even Colorado's warmest summers do not provide the sustained warmth needed for established populations. The western slope of Colorado, including areas near the Colorado River and some lower elevation valleys, may occasionally harbor chiggers in very limited and sporadic populations, but encounters would be extremely uncommon. The mountains, high plains, and most inhabited areas of Colorado are free from chiggers year-round. This is excellent news for outdoor fans, as chigger prevention is not necessary in Colorado. For detailed information about wildlife safety in Colorado and specific animal concerns, visitChigger in coloradoresources appropriate for your destination.
How Dangerous Is It?
Since chiggers are not established in Colorado, there is no danger from chigger bites in the state. This eliminates one outdoor concern compared to outdoor recreation in warm, humid regions of the country. For reference, in states where chiggers are present, bites are not medically serious, though they are uncomfortable and itchy. Chigger welts appear as small red bumps and the itching can be intense for several days, but bites do not cause serious health consequences and do not transmit diseases. There are no long-term effects from chigger exposure, and bites heal completely within one to two weeks. The main medical concern in other states is secondary infection from scratching the welts. Colorado residents and visitors have one fewer outdoor parasitic pest to worry about compared to people in warmer climates. The state's natural temperature barriers protect against not only chiggers but many other warm-weather arthropod pests. This contributes to Colorado's reputation as an excellent outdoor recreation destination. For more on chigger in Colorado, see ourColorado chigger guide.
How to Recognize One
Because chiggers are not present in Colorado, you will not encounter them in the state regardless of your outdoor activities or hiking location. However, for people relocating from warmer states or for travelers, knowing how to identify chiggers can be useful for visits to other regions. Chiggers in their larval stage, which is the stage that bites humans, are nearly microscopic and appear as tiny red or orange specks about the size of a grain of sand. You are far more likely to notice the itchy welts caused by chiggers than to see the mites themselves. Bites appear as small red bumps or welts, often in clusters, in areas where clothing fits tightly such as around the waist, ankles, or groin. Chiggers are found in warm grasslands and areas with low vegetation and moist soil. If you are planning to travel to warmer states from Colorado, learning to recognize chigger habitat and bites can help you take preventive steps while visiting other regions. You can also browseColorado wildlife.
What to Do If You Are Bitten or Stung
Since chiggers are not present in Colorado, you will not need to treat chigger bites while in the state. However, if you travel to warmer states where chiggers are present and receive bites, the first response is to bathe with warm soapy water to remove any remaining chiggers from your skin. Wash all affected clothing and gear in hot water. Keep your hands clean and resist scratching the welts, even though the itching is intense, because scratching can lead to secondary infection. Over-the-counter antihistamines or hydrocortisone cream can help relieve itching. Calamine lotion, baking soda paste, or other topical itch relievers are available at drugstores and may provide relief. Most bites heal within one to two weeks without further treatment. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. Do not use home remedies such as nail polish, gasoline, or heat, as these are ineffective and can harm your skin. See all of ourwildlife guides.
How to Prevent Encounters
In Colorado, you do not need to take any special precautions against chiggers because they are not present in the state. This allows you to focus on protecting yourself from other outdoor hazards that are actually relevant to Colorado wilderness and recreation. Colorado's mountain weather, UV exposure, altitude effects, and wildlife such as bears and mountain lions are far more significant concerns for outdoor safety than chiggers. If you are traveling from Colorado to warmer states where chiggers are present, you can take simple preventive steps to reduce your risk. Wear long pants and long sleeves when hiking or working in grassy or brushy areas, and tuck your pants into your socks. Wear closed-toe shoes and avoid sitting directly on grass or earth. After outdoor activities in warm states, shower and wash your clothes immediately in hot water. Applying insect repellent containing DEET or permethrin to skin and clothing before going outside can also help. Colorado's natural conditions already provide complete protection from chiggers without any effort on your part.
Where in Colorado and When
Chiggers are not found anywhere in Colorado at any time of year, so there is no season when you need to be concerned about them in the state. Chiggers are a pest of warm, humid regions and are found throughout much of the southeastern United States, in parts of California and the Southwest, and in scattered locations in warmer areas nationwide. The northernmost established populations of chiggers in the United States occur in the southern states, and their range does not extend into Colorado under any circumstances. Even during Colorado's warmest months, such as July and August, the state's elevation and climate are too cool for chiggers to establish populations. Higher elevations, which characterize most of Colorado, remain cool even during summer heat waves. The western slope and lower valleys of Colorado, while somewhat warmer than mountain regions, still lack the sustained heat and humidity required for chigger survival. Travelers interested in understanding regional wildlife differences can learn about animals found inmore on Chigger in coloradoto better prepare for outdoor activities in Colorado and other states.
Harmless Lookalikes
Because chiggers are not present in Colorado, there is no risk of mistaking them for other creatures in the state. However, if you travel to warmer states, understanding common sources of confusion can help you correctly identify chigger bites. Mosquito bites are often confused with chigger bites because both cause red welts and itching, but mosquito bites typically appear on exposed skin and are usually larger and more scattered than chigger welts. Flea bites also produce red welts and clustering, but are typically smaller. Bed bug bites appear in clusters on exposed skin and are primarily an indoor concern. Other mites such as clover mites and dust mites do not bite or cause visible welts. Scabies mites do bite and cause intense itching but produce a very different pattern of burrows and are much less common. Tick bites are common in Colorado and create a red spot, but ticks are a much greater concern than chiggers in the state. Most outdoor pests and parasites are region-specific, and one benefit of living in Colorado is protection from many arthropod-borne nuisances found in warmer regions.
Frequently Asked Questions
Are chiggers deadly? No, chigger bites are not deadly and do not cause serious medical complications. Death from chiggers has never been reported in the United States, even in regions where they are very common. How common are chigger bites in Colorado? Chigger bites do not occur in Colorado because chiggers are not established in the state. Colorado residents are fortunate to be free from this pest entirely. What attracts chiggers to a house? Chiggers do not occur in Colorado, so this is not a concern for Colorado residents. In warmer states where chiggers are present, they are attracted to outdoor vegetation and cannot survive long indoors. Can I get chiggers if I visit other states? Yes, if you travel to the southern or eastern United States or parts of California during warm months, you can potentially receive chigger bites. Taking simple precautions such as wearing long pants, applying insect repellent, and showering after outdoor activities can significantly reduce your risk. For more complete information about outdoor safety andcolorado wildlife guide, visit wildlife resources to prepare for outdoor adventures in Colorado and other regions.
Plan your trip
Best time to see chigger in Colorado: March, April, August
See the month-by-month sighting calendar.
Plan your chigger sighting in Colorado
1 verified chigger records have been logged in Colorado. See the GBIF records.
Where to look in Colorado
- Bent's Old Fort National Historic Site · Wildlife Watching, Birdwatching · Find hotels
- Black Canyon Of The Gunnison National Park · Wildlife Watching, Birdwatching · Find hotels
- Colorado National Monument · Wildlife Watching · Find hotels
- Curecanti National Recreation Area · Wildlife Watching, Birdwatching · Find hotels
- Dinosaur National Monument · Wildlife Watching, Birdwatching · Find hotels
- Great Sand Dunes National Park & Preserve · Wildlife Watching, Birdwatching · Find hotels
Frequently asked questions
Are They in Colorado?+
Chiggers are not established in most of Colorado and are extremely rare in the state. Colorado's high average elevation, cool climate, and relatively low humidity are fundamentally unsuitable for chiggers to survive and reproduce. The vast majority of Colorado lies above 4,000 feet elevation, and most of the state is above 5,000 feet, which is too cool for chigger populations to persist. Chiggers require warm, humid conditions to complete their life cycle, and even Colorado's warmest summers do not provide the sustained warmth needed for established populations. The western slope of Colorado, including areas near the Colorado River and some lower elevation valleys, may occasionally harbor chiggers in very limited and sporadic populations, but encounters would be extremely uncommon. The mountains, high plains, and most inhabited areas of Colorado are free from chiggers year-round. This is excellent news for outdoor fans, as chigger prevention is not necessary in Colorado. For detailed information about wildlife safety in Colorado and specific animal concerns, visitChigger in coloradoresources appropriate for your destination.
How Dangerous Is It?+
Since chiggers are not established in Colorado, there is no danger from chigger bites in the state. This eliminates one outdoor concern compared to outdoor recreation in warm, humid regions of the country. For reference, in states where chiggers are present, bites are not medically serious, though they are uncomfortable and itchy. Chigger welts appear as small red bumps and the itching can be intense for several days, but bites do not cause serious health consequences and do not transmit diseases. There are no long-term effects from chigger exposure, and bites heal completely within one to two weeks. The main medical concern in other states is secondary infection from scratching the welts. Colorado residents and visitors have one fewer outdoor parasitic pest to worry about compared to people in warmer climates. The state's natural temperature barriers protect against not only chiggers but many other warm-weather arthropod pests. This contributes to Colorado's reputation as an excellent outdoor recreation destination. For more on chigger in Colorado, see ourColorado chigger guide.
More wildlife in Colorado