Does Little Platte River hold wild trout?

Yes. The state classifies Little Platte River as Class II (some natural reproduction) across 4.35 miles of stream. That classification means natural reproduction, not stocking. Source: Wisconsin DNR Classified Trout Streams.

Little Platte River

Wisconsin. Classified Class II (some natural reproduction) by the state across 4.35 miles.

State Trout Classification

Classification	Class II (some natural reproduction)
Classified length	4.35 miles

Source: Wisconsin DNR Classified Trout Streams.

USGS Gauges on Little Platte River

Gauge	Station	Water temp?
05414213	LITTLE PLATTE RIVER NEAR PLATTEVILLE, WI	—

Fly fishing rivers →Wisconsin trout water →Wisconsin lakes →

Conditions: USGS NWIS (public domain). Classification: Wisconsin DNR Classified Trout Streams.