Preheat the oven to 325° F and line a large rimmed baking sheet with a silicone mat or parchment paper.
In a small saucepan, combine the brown sugar, brown rice syrup, oil, and salt. Cook over low heat, stirring frequently, until the mixture is hot and bubbly. Remove from heat.
Meanwhile, in a large bowl, combine the oats, pecans, and pepitas. Stir in the sugar mixture to coat.
Spread the mixture onto the prepared baking sheet and bake, stirring every 10 minutes, until the granola is golden, about 40 minutes. Keep a close eye on it so that it doesn’t burn.
After about 40 minutes, remove the baking sheet from the oven and stir in the raisins. Return the oven for about 5 more minutes. Remove the baking sheet from the oven and let cool completely.
Break into large chunks and pack it up for your trip!