| Trail segment | Primary monitoring method (summer 2019) | Cross-validation monitoring method |
| Base Plaza | Overflow parking lot inductive loop counts + main parking lot count assumptions (July 1 thru September 9) | Infrared sensor (July 1 thru September 9) for diurnal and weekly data patterns; Low-energy Bluetooth Sensors (July 3 thru July 9) to estimate visitor travel time for main parking lot assumptions |
| Start of Trail to Benson Bridge | Infrared sensor (July 1 thru September 9) | Manual count (1 hour to determine relative infrared sensor accuracy) |
| Benson Bridge to turnaround point | Infrared sensors (July 1 thru September 9) | Manual count (1 hour) |
| Turnaround point to top of waterfall | Infrared sensors (July 1 thru September 9) | Manual count (1 hour) |
| [After the top of the waterfall to a separate 4.5-mile loop trail*] | Infrared sensors (July 1 thru September 9) | Manual count (1 hour) |