"The way is perilous, filled with dangers"

This isn't a specific challenge, it's more of an ongoing threat. Save it for truly dangerous legs of travel: Ferrier's Fen, the Steplands near the lakes, the Labyrinth, etc.

On each leg of perilous travel, and each time they Make Camp in a perilous area, point to a looming danger or introduce a danger that's already been established. Then see how they respond.

For their next point of interest, I pick a spot where I can introduce another challenge: a valley where three tributaries of the Sruth come together, and they risk picking the wrong one and getting lost. I frame a scene with them overlooking the valley, describe the environment, and introduce the danger. "It's not clear from here which one leads to Three Coven Lake. Pick wrong and you'll end up lost or at least wasting lots of time. What do you do?" Vahid Knows Things (recalling his previous wanderings in these parts) and gets an 11. I reveal that they want the southern fork. Huzzah!

Their next point of interest will be wherever they Make Camp, and this leg is just more rugged, muddy hills as they follow the tributary. They've already dealt with the treacherous terrain, but I also said that the way will be grueling. So, I present a choice of paths. "Rhianna, you're humping up the twentieth slope today, and it's just a wet slog. You've got a few hours of light left. Do you want press on and Struggle as One with CON? Or look for a place to camp, maybe hunt a bit?" They opt to stop and Forage Forage, but get a 6-. This area is perilous, so I aggressively introduce a danger. A Hillfolk ambush it is!

If you like, have them roll the Die of Fate.