It's a mixed bag of beautiful weather and serious environmental hazards, so pick your running battles wisely, Angelenos.
Why Today is Probably Not Your PR Day
Your Lungs Are Under Assault (Again): Don't let that clear sky fool you. We're staring down "Very High" pollen counts, a moderate AQI with ozone as the dominant pollutant, and new prescribed fires started yesterday in LA County. There was even a "breaking" wildfire reported today, February 25th, in the county. That's a triple threat for your respiratory system. It's like asking your lungs to filter a smoothie made of allergens, smog, and ash. Good luck with that.
Windy with a Chance of Debris (and More Pollen/Smoke): Today’s got some teeth, with wind gusts hitting 30 to 45 mph in spots like the Santa Monica Mountains, the I-5 corridor, and the Antelope Valley. Those aren't just a gentle breeze to cool you down; they're nature's way of flinging whatever loose dust, pollen, and yes, smoke, is hanging around straight into your face. Plus, high winds mean a higher risk of unexpected trail debris or even downed branches.
Trail Closures and Hidden Hazards: While we’ve had some clear days, remember that atmospheric river system that just passed through? Even if the sun's out now, recent heavy rains and high winds earlier this month have done a number on our mountain trails. Several trails in the Angeles National Forest, particularly around Mount Baldy, remain closed through February 26th due to hazardous winter conditions. Ignoring those signs isn't gutsy; it's an express ticket to a sprained ankle or worse on unstable terrain.
Environmental Breakdown
| Factor | Level/Value | Impact on Workout | | :--- | :--- | :--- | | Pollen | Very High | Major irritation for airways, especially for allergy sufferers. | | Air Quality | AQI 58 (Moderate)| Dominant pollutant: Ozone. Can cause breathing discomfort. | | Temperature | 25.3°C (77.5°F) | Warm, clear skies. Requires proper hydration. | | Wind | 30-45 mph gusts | Spreads pollen/smoke, potential for debris, increased dehydration. | | Wildfires | Active Fires | Smoke contribution to poor air quality. |
Severe Air Quality Risk: With very high pollen, moderate ozone, and active local fires (including a breaking wildfire reported today in LA County), your lungs are working overtime. If you have asthma or allergies, seriously reconsider outdoor exercise. Everyone else, expect reduced performance and potential irritation.
Watch for High Winds and Debris: Gusts up to 45 mph in mountain and valley areas can make running feel like a fight. Be aware of your surroundings for falling branches or other wind-blown hazards. And remember, that wind is just carrying more of that "very high" pollen and any fire smoke directly to you.
Hydrate and Check Trail Status: Despite the pleasant temperature, the winds can accelerate dehydration. Drink up! Also, do not ignore trail closure signs in the Angeles National Forest, especially around Mount Baldy. Old storm damage and unstable conditions are no joke, and a twisted ankle isn't worth the Instagram pic. Consider indoor options or a very gentle, flat, urban walk if you absolutely need to move.
Data grounded with Sacramento Bee, LAist, Angeles National Forest, and Los Angeles Times from February 25, 2026.