I wasn't sure, so I found this:

Running metrics on Apple Watch
Workout views for Outdoor Run workouts
The Outdoor Run workout includes these metrics:
Metrics: Current heart rate, rolling mile, average pace, distance

Metrics 2: Running cadence, stride length, ground contact time, vertical oscillation

Heart Rate Zones: Current heart rate, time in zone, heart rate average

Split: Split number, split pace, split distance, current heart rate

Segment: Segment number, segment pace, segment distance, current heart rate

Elevation: Elevation profile over the last 30 minutes, elevation gained, current elevation
Power: Power profile over the last 30 minutes, current power, running cadence

Activity rings: Move, exercise, stand