This paper uses over 30 million individual-level trips in federal recreation locations to investigate the impact of short-term temperature shocks on outdoor recreation activities. Our results show that in the short term, a 1◦C temperature increase during the last 6 months increases the total trip duration by 1.197 days (or a 4.12% increase) and the total number of trips by 0.472 (or a 5.44% increase) at the zipcode-month level. The positive effect is primarily driven by the increased number of trips and more in- state travel. We find that the impact of temperature on the number of recreation trips generally increases under a higher temperature. When the monthly temperature is below < 5◦C, the temperature increase will reduce the number of trips as individuals in low-temperature regions is likely to reduce travel demand when the temperature gets warmer.