To find images of the Oregon Trail, you can try the following websites:
1. Library of Congress - The Library of Congress has a vast collection of historical images, including many related to the Oregon Trail. You can search their online catalog at https://www.loc.gov.
2. Oregon-California Trails Association - This nonprofit organization dedicated to preserving and promoting the history of the Oregon Trail has a website with a section dedicated to images. You can check it out at https://www.octa-trails.org.
3. National Park Service - The National Park Service's website often has images and resources related to national historic trails, including the Oregon Trail. You can visit their website at https://www.nps.gov.
4. Pinterest - You can also try searching on Pinterest, a social media platform where users share images and resources. Simply go to https://www.pinterest.com and enter "Oregon Trail" in the search bar.
Remember, when using images from the internet for submission or any other purpose, it's important to verify their source and ensure they are properly attributed if necessary.