Background: Educators report needing relevant and authentic climate change educational resources (CCER). National parks are informal education centers that can provide CCER for educators. However, little is known about the CCER that exist across the national parks in the United States. Purpose: To increase the knowledge in this area, this study uncovered which CCER are offered by national parks in the US, what content is covered in these resources, and their perceived affordances and constraints. Methodology/Approach: Park employees completed an online survey regarding the CCER available within their national park. The survey included closed-ended and open-ended questions. Closed-ended responses were analyzed for descriptive statistics regarding the types of CCER. Open-ended responses were analyzed for content in the CCER, perceived affordances and constraints, and future directions. Findings/Conclusions: Results show that the national parks in this study collectively offer a variety of CCER that cover a range of climate change topics. In addition to the material resources provided, national parks also provide social resources for educators. Collectively, these resources offer many educational affordances. Implications: This study suggests that science educators should consider leveraging the CCER available from national parks. In addition, national parks should consider collaborating in the development of CCER.