diff --git a/README.md b/README.md
index 3a73251..e9e0385 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1221 TILs and counting..._
+_1222 TILs and counting..._
 
 ---
 
@@ -925,6 +925,7 @@ _1221 TILs and counting..._
 ### Remix
 
 - [Get Query Params From The Request URL](remix/get-query-params-from-the-request-url.md)
+- [Markdown And MDX Files Are Rendered To Routes](remix/markdown-and-mdx-files-are-rendered-to-routes.md)
 - [Relative And Absolute Paths In Links](remix/relative-and-absolute-paths-in-links.md)
 - [Run The Development Server From Another Port](remix/run-the-development-server-from-another-port.md)
 - [Set The Title Of A Page](remix/set-the-title-of-a-page.md)
diff --git a/remix/markdown-and-mdx-files-are-rendered-to-routes.md b/remix/markdown-and-mdx-files-are-rendered-to-routes.md
new file mode 100644
index 0000000..bc4e388
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+++ b/remix/markdown-and-mdx-files-are-rendered-to-routes.md
@@ -0,0 +1,24 @@
+# Markdown And MDX Files Are Rendered To Routes
+
+If you put a markdown or [mdx](https://mdxjs.com/) file somewhere within the
+`app/routes` directory of a [Remix](https://remix.run/) app, it knows how to
+render it to HTML. There is no additional setup necessary, it works out of the
+box.
+
+For instance, trying creating an `about.md` file under `app/routes`.
+
+```markdown
+# About
+
+My name is **Josh Branchaud** and I am an _independent_ software developer.
+
+Reach out to me at <a href="mailto:josh@email.com">josh@email.com</a>.
+```
+
+Now, run the app's dev server and visit `localhost:3000/about`. You'll see a
+fairly unstyled page with this text rendered to it. Try inspecting the source
+and you'll see, for instance, that _About_ is wrapped in an `<h1>` tag.
+
+If you want this markdown styled (e.g. a larger font size for that `<h1>`),
+you'll either have to write some custom styles or pull in something like
+[`@tailwindcss/typography`](https://tailwindcss.com/docs/typography-plugin).