diff --git a/src/main/kotlin/p32xx/Problem3285.kt b/src/main/kotlin/p32xx/Problem3285.kt
new file mode 100644
index 00000000..76610e23
--- /dev/null
+++ b/src/main/kotlin/p32xx/Problem3285.kt
@@ -0,0 +1,17 @@
+package p32xx
+
+import util.expect
+
+fun main() {
+    class Solution {
+        fun stableMountains(height: IntArray, threshold: Int): List<Int> {
+            return (1 until height.size).filter { height[it - 1] > threshold }
+        }
+    }
+
+    expect {
+        Solution().stableMountains(
+            intArrayOf(), 5
+        )
+    }
+}