Preheat oven to 325° F.
Combine oats, brown rice cereal, walnuts, pumpkin seeds, cranberries, dates, cinnamon and salt in a large bowl and set aside.
Stir together brown rice syrup and peanut butter in a small saucepan. Heat over medium heat until mixture softens and bubbles slightly.
Remove from heat and stir in vanilla.
Pour syrup mixture over oat mixture and stir until well combined. (It should be very thick.)
Spread mixture in a 9x9 pan, lined with parchment paper. Press down on mixture with the back of a wooden spoon to even out. Alternatively, you may lightly wet hands and use them to press the mixture.
Place in oven and bake for 15 minutes.
Remove from pan using the parchment paper to lift it out. Let it cool for a few minutes.
Slice into bars with a serrated knife.
When totally cool, either serve, or wrap bars individually in plastic wrap and store in the refrigerator for up to 2 weeks, or in the freezer for one month.