TRAFx trail counters were utilized to count trail usage at several parks. With an average of data counted for 323 days a year. Trail counters sometimes have difficulty collecting data during the extreme cold. Several campgrounds were closed due to flooding limiting data collections as well.
| Site | Average Daily Total |
|---|---|
| Finley's Landing | 152 |
| HT-Budd Rd | 124 |
| HT-Durango | 229 |
| HT-Dyersville | 148 |
| HT-Epworth | 82 |
| HT-Extension | 320 |
| HT-Farley | 71 |
| HT-Graf | 112 |
| HT-Sageville | 370 |
| HT-Twin Springs | 527 |
| JD Marsh | 54 |
| Little Maq River Mounds | 9 |
| Massey Marina | 251 |
| Polhman Prairie | 6 |
| Ringneck Ridge | 11 |
| Swiss Valley Park | 197 |
“All infrared trail counters undercount when people travel side by side, or in tight groups. Therefore, it can be said that trail counters yield estimates rather than absolutes. It is difficult to give a single number regarding accuracy because it is dependent upon various factors: how people typically use the trail (single file or side by side), how far apart people are spaced, how busy the trail is, trail width, etc. If the trail is narrow and people travel single file and spaced apart, you can expect high accuracy (95 to 100%); if the trail is wide and people typically travel side by side or in tight groups, you can expect accuracy in the range of 75% to 90%.”~ (from Trafx.com)