diff --git a/2020/3/data.txt b/2020/3/data.txt
new file mode 100644
index 0000000..0fe60b0
--- /dev/null
+++ b/2020/3/data.txt
@@ -0,0 +1,323 @@
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diff --git a/2020/3/main.py b/2020/3/main.py
new file mode 100644
index 0000000..33cfd56
--- /dev/null
+++ b/2020/3/main.py
@@ -0,0 +1,30 @@
+from pprint import pprint
+
+with open("data.txt", "r", encoding="utf-8") as f:
+	data = [x.rstrip() for x in f]
+
+def traverse(tx, ty):
+	x = y = 0
+	max_x = len(data[0])
+	max_y = len(data) - 1
+	trees = 0
+
+	while True:
+		x += tx
+		xi = x % max_x
+		y += ty
+
+		if y > max_y:
+			return trees
+
+		assert data[y][xi] in (".", "#")
+		if data[y][xi] == "#":
+			trees += 1
+
+trees = 1
+for x in ((1, 1), (3, 1), (5, 1), (7, 1), (1, 2)):
+	z = traverse(*x)
+	print(f"The toboggan encountered {z} trees.")
+	trees *= z
+
+print(f"Sum: {trees}")
diff --git a/2020/3/test.txt b/2020/3/test.txt
new file mode 100644
index 0000000..7e88cdc
--- /dev/null
+++ b/2020/3/test.txt
@@ -0,0 +1,11 @@
+..##.......
+#...#...#..
+.#....#..#.
+..#.#...#.#
+.#...##..#.
+..#.##.....
+.#.#.#....#
+.#........#
+#.##...#...
+#...##....#
+.#..#...#.#