Topo Athletic MTN Racer 3 Review: Steeper MTN, Still a Racer Believe Topo MTN Racer 3, Men's Trekkers Outdoor Ltd. Topo Athletic MTN Racer 3 Review: Steeper MTN, Still a Racer Believe Topo Athletic MTN Racer 3 Review: Steeper MTN, Still a Racer Believe Topo Athletic MTN Racer 3 Review: Steeper MTN, Still a Racer Believe. The Men's Mtn Racer 3 Running Shoes by Topo Athletic are a perfect blend of style and functionality, crafted for the active man. These shoes feature a flat, chunky heel for stability, ideal for hiking and athleisure activities. They come in a striking Black Lime color, offering a round toe design for comfort. Enjoy these versatile shoes throughout the summer season.