Sign into your account at www.scvngr.com/login and click the Builder link from the top bar. The Builder allows you to construct custom game elements (challenges, treks, rewards) and deploy them using capacity. Select the trek tab and get started by defining the trek’s criteria (keyword, location, description). After completing this information you can design the challenges for the trek. If it’s your first time building on SCVNGR it might be helpful to check out the ‘How to Build’ tutorial found at www.scvngr.com.