Rainbow Cove Trail, a mere 0.8 miles long,  serves as both a interesting side trip for backpackers spending the night at the Feldtmann Lake Campground and a portage for kayakers paddling around the south shore. Along Rainbow Cove the trail post is 220 yards north of a stream that empties from Feldtmann Lake. From the Feldtmann Lake end the trail junction is reached just before crossing a bridge over that stream.

The easy trail is surprisingly dry, considering the swamp it passes through. It is level most of the distance except for a slight rise in the middle, where it swings away from the stream and drops to Feldtmann Lake Campground.

Kayakers should consider portaging their boats into Feldtmann Lake for early-morning fishing. The lake is renowned for its fine pike fishing but rarely sees any action beyond the shore fishermen who hike in. With a kayak, anglers can fish the undisturbed middle or north-shore portions of the lake and have a chance of landing a pike that exceeds 30 or 40 inches.