Origami, the ancient Japanese art of paper folding, has captivated people of all ages with its ability to transform a simple sheet of paper into intricate, three-dimensional designs. One of the most fundamental yet versatile folds in origami is the mountain fold, which forms the basis for numerous origami models. In this guide, we will walk you through the process of creating a mountain fold, step by step, ensuring that you master this essential origami technique.

Before we dive into the mountain fold, let's briefly discuss the importance of this fold in origami. The mountain fold is a fundamental building block that helps create depth and dimension in your origami creations. It is used to form various shapes, such as mountains, waves, and petals, making it an indispensable skill for both beginners and experienced folders alike.

Understanding the Mountain Fold
To begin, it is crucial to understand what a mountain fold is and how it differs from other origami folds. A mountain fold, also known as a valley fold, creates a V-shaped crease that points upwards, resembling a mountain peak. This is in contrast to a valley fold, which creates a V-shaped crease that points downwards, resembling a valley.

Mountain folds are typically used to create raised or convex shapes, while valley folds are used to create sunken or concave shapes. By combining these two folds, origami artists can create a wide range of intricate and dynamic designs.
Preparing Your Paper
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Before you start folding, it is essential to choose the right paper for your origami project. Traditional origami uses square paper, typically made from a strong, thin paper called kami. For beginners, it is recommended to use a larger paper size, such as 6x6 inches or 9x9 inches, to make the folds easier to see and execute.
Once you have your paper, follow these steps to prepare it for the mountain fold:
- Start with a square piece of paper, colored side facing down.
- Make sure the paper is flat and free of creases.
- If your paper is not already square, trim the edges to create a perfect square.

Making the First Mountain Fold
Now that your paper is prepared, let's create your first mountain fold. Follow these steps carefully to ensure a precise and symmetrical fold:
- Hold the paper flat on a smooth, hard surface, such as a table or cutting board.
- Fold the paper in half diagonally, creating a triangle shape. The crease should run from one corner of the paper to the opposite corner.
- Make sure the edges of the paper align perfectly along the crease.
- Unfold the paper, so it returns to its original square shape.

Congratulations! You have just made your first mountain fold. The crease you created will serve as the foundation for many of your future origami projects.
Exploring Mountain Fold Variations




















Now that you have mastered the basic mountain fold, let's explore some variations that will help you create even more intricate and dynamic designs.
One popular mountain fold variation is the reverse mountain fold. This fold creates a V-shaped crease that points downwards, resembling a valley rather than a mountain. To create a reverse mountain fold, simply fold the paper in the opposite direction as you would for a regular mountain fold.
Creating a Reverse Mountain Fold
Follow these steps to create a reverse mountain fold:
- Start with a square piece of paper, colored side facing down.
- Fold the paper in half diagonally, creating a triangle shape. However, this time, the crease should run from the midpoint of one side of the paper to the opposite corner.
- Make sure the edges of the paper align perfectly along the crease.
- Unfold the paper, so it returns to its original square shape.
The reverse mountain fold is an essential technique for creating sunken or concave shapes in your origami designs. By combining regular and reverse mountain folds, you can create a wide range of shapes and textures.
Making a Squash Fold
Another mountain fold variation is the squash fold, which involves collapsing the paper along a crease to create a flat, square shape. This fold is particularly useful for creating flat, geometric shapes, such as squares, rectangles, and diamonds.
To create a squash fold, follow these steps:
- Start with a square piece of paper, colored side facing down.
- Fold the paper in half diagonally to create a triangle.
- Fold the triangle in half again along the same crease, creating a smaller triangle.
- Collapse the paper along the crease, pushing the two layers of paper together to create a flat, square shape.
The squash fold is a versatile technique that can be used to create a wide range of origami shapes and patterns. By combining squash folds with other origami techniques, you can create intricate and dynamic designs that showcase your creativity and skill.
As you continue to explore the world of origami, you will discover that the mountain fold is a fundamental building block that underpins many of the art form's most iconic and beautiful designs. By mastering the mountain fold and its variations, you will be well on your way to creating your own origami masterpieces. So grab a sheet of paper and start folding – the possibilities are endless!