Happy Panther trail starts at the East Bank Trailhead and follows the Ruby Arm of Ross Lake back to the edge of the lake near the dam. The trail ends 0.1 mile (0.16 km) east of the bottom of the Ross Dam Trail access road. The forested trail crosses beautiful creeks as it cuts across the steep bank of Ruby Arm.
- Difficulty: Moderately easy.
- Distance and elevation: 10 miles (16.1 km) roundtrip with 400 foot (120 m) elevation gain
- Access: The trailhead is at milepost 138 on State Route 20.
- Leashed dogs allowed.