Help with Sub menus

I have tried to place several menu items underneath the menu item “The Ride” such as “The routes”.

Every time I make the change, a drop down arrow shows up on the mobile version and it works correctly, however, it doesnt work correctly on the desktop version. My site can be found at https://kqh.gmk.mybluehost.me/HotHundred/

Any help you can give is appreciated.