Why Checking Conditions Matters
National forests are not theme parks. There are no gates, no staff checking conditions at the entrance, and no automated warning system that stops you from driving into a fire zone. The responsibility falls entirely on you.
This is not a theoretical concern. Western fire seasons have grown longer and more intense over the past two decades. The 2020 fire season alone burned over 10 million acres across the western United States, closing hundreds of trails and entire forests for weeks or months. Flash floods kill more people in the U.S. each year than any other weather-related hazard. Avalanches claim an average of 25 lives per year in the backcountry.
Every trip into a national forest starts with the same step: check current conditions with official sources.
Official Sources to Check Before Every Trip
InciWeb: Active Wildfires
InciWeb is the official interagency incident information system for wildfires and prescribed burns on federal land. It provides current fire perimeters, evacuation zones, road closures, and containment status.
Check InciWeb before any trip to a western national forest from June through October. Fire conditions can change within hours: a trail that was open in the morning may be closed by afternoon.
InciWeb covers:
- Active wildfire locations and perimeters
- Prescribed burn schedules
- Evacuation orders and warnings
- Road and trail closures related to fire
AirNow: Smoke and Air Quality
AirNow.gov provides real-time Air Quality Index (AQI) readings from monitoring stations across the country. During fire season, smoke from regional fires can reduce air quality hundreds of miles from the fire itself.
AQI thresholds that matter for outdoor recreation:
- 0-50 (Green): Good. No restrictions.
- 51-100 (Yellow): Moderate. Unusually sensitive individuals may want to limit prolonged outdoor exertion.
- 101-150 (Orange): Unhealthy for sensitive groups. People with asthma, heart disease, or respiratory conditions should limit outdoor activity.
- 151-200 (Red): Unhealthy for everyone. Consider postponing your hike.
- 201+ (Purple/Maroon): Very unhealthy to hazardous. Stay indoors. Do not hike.
Smoke tends to settle in valleys overnight and may clear by midday, or it may persist for weeks depending on fire behavior and wind patterns. AQI can swing 100 points in a few hours.
NOAA Weather: Forecasts and Severe Weather Alerts
NOAA Weather provides the most reliable forecasts for outdoor recreation, including point forecasts for specific coordinates.
Check for:
- Flash flood watches and warnings before visiting canyon trails or areas with creek crossings
- Thunderstorm forecasts before above-treeline hikes (afternoon thunderstorms are common in mountain regions from June through September)
- Winter storm warnings before any shoulder-season or winter backcountry trip
- Extreme heat advisories before desert or low-elevation hikes in summer
NOAA forecasts are more granular than commercial weather apps and include specific hazard messaging for outdoor recreation.
Avalanche.org: Avalanche Forecasts
Avalanche.org aggregates avalanche forecasts from regional avalanche centers across the western United States. If you are traveling in mountainous terrain during winter or spring (typically November through June, depending on snowpack), check the forecast for your specific region.
Avalanche danger ratings:
- Low (1): Generally safe conditions. Natural avalanches unlikely.
- Moderate (2): Heightened conditions on specific terrain features. Travel with caution.
- Considerable (3): Dangerous conditions. Careful route-finding and assessment required.
- High (4): Very dangerous. Travel in avalanche terrain not recommended.
- Extreme (5): Avoid all avalanche terrain.
Backcountry winter travel in avalanche terrain requires training (at minimum an AIARE Level 1 course) and equipment: avalanche beacon, shovel, and probe for every member of the group.
USFS Alerts: Forest Closures and Restrictions
The USFS Alerts page provides forest-specific closure orders, fire restrictions, and road closures. You can filter by state or forest name.
Types of restrictions:
- Stage 1 fire restrictions: Campfires prohibited outside developed campgrounds. Camp stoves typically still allowed.
- Stage 2 fire restrictions: All open flames prohibited, including camp stoves in some cases. Smoking restricted to enclosed vehicles or buildings.
- Forest closure orders: Legally binding closures of specific areas, trails, or entire forests. Entering a closed area carries fines up to $5,000 and potential criminal charges.
Closure orders can be issued with little advance notice. A trail that was open last weekend may be closed today. Always check before driving to the trailhead.
Recreation.gov: Permits and Closure Notices
Recreation.gov manages permit reservations for many high-use areas and posts closure notices that affect reservations. If your trip requires a permit, check Recreation.gov for both availability and any active closures.
Local Ranger District
For the most current conditions on a specific trail or area, call the local ranger district directly. Rangers know about hazard trees, washouts, bridge failures, and other conditions that may not appear on any website. Contact information for all ranger districts is available at fs.usda.gov/contactus/regions.
Fire Season by Region
Fire season timing varies by region. The following are general patterns: actual conditions vary significantly year to year based on drought, snowpack, temperature, and wind.
Pacific Northwest (Oregon, Washington): Fire season typically runs mid-July through October. Smoke from regional fires is common in August and September. The forests most affected include Deschutes, Mount Hood, Gifford Pinchot, and Willamette.
California / Sierra Nevada: Fire season runs June through November, sometimes longer during drought years. The Angeles, San Bernardino, Inyo, and Tahoe national forests are all in high-fire-risk regions.
Southwest (Arizona, New Mexico): Fire risk peaks May through June (pre-monsoon dry season). Monsoon season (July through September) brings relief from fire but introduces flash flood and lightning risk. Coconino National Forest is particularly affected.
Rocky Mountains (Colorado, Utah, Montana): Fire season runs June through September. High-elevation forests like White River, Uinta-Wasatch-Cache, and Flathead face both fire and afternoon thunderstorm risk during summer.
Southeast (North Carolina, Georgia, Virginia): Fire risk is lower than in the West but increases during fall dry spells. Pisgah, Chattahoochee-Oconee, and George Washington and Jefferson occasionally issue burn bans during extended dry periods.
Northeast (New Hampshire): Wildfire risk is low. The primary hazards in the White Mountain National Forest are severe weather (wind, cold, and ice), which can occur any month of the year.
Post-Fire Terrain
Forests that have experienced significant wildfires in recent years present additional hazards even after the fire is out:
- Hazard trees: Fire-weakened trees can fall without warning. Snags (standing dead trees) are particularly dangerous in wind.
- Erosion and landslides: Burned slopes lose ground cover and are prone to landslides and debris flows during rain. The risk is highest in the first two to three rainy seasons after a fire.
- Trail damage: Bridges, signs, and trail tread may be destroyed. Trails may be rerouted or closed indefinitely.
- Water quality: Ash and debris can contaminate water sources for months after a fire.
If a forest you plan to visit has had a major fire in the past five years, call the ranger district for current trail status and be prepared for changed conditions.
The Bottom Line
No website, including this one, can replace real-time condition checking. Content on ForestMatters.com reflects conditions at the time of writing. Fires, floods, closures, and weather events can change conditions between publication and your visit.
Before every trip:
- Check InciWeb for active fires
- Check AirNow.gov for air quality
- Check NOAA Weather for forecasts and alerts
- Check USFS Alerts for closures
- Call the local ranger district for trail-specific conditions
This takes five minutes. It could save your life.