Flint Hills (IMAGE) Kansas State University Caption Burning in the Flint Hills is typically concentrated in late April. The time frame stems from research conducted more than 40 years ago. Credit Kansas State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.