Trail Segment Lengths
| Trail 21 Legs | Dist Feet | Dist Meters |
| T21 L1 | 2877 | 877 |
| T21 L2 | 1057 | 322 |
| T21 L3 | 569 | 173 |
| Total Length Trail 21 | 4503 | 1372 |
| Trail 21 Exit | ||
| Exit to Larkview * | 12 | 4 |
| Other | ||
| Gauge Drive Median | 14 | 4 |
| Crosspointe Drive Median | 408 | 124 |
Interesting points on trail 21:
To cross Gauge Drive there is a cutout in the median. To cross Crosspointe Drive, you have to go around the median out to Rt 123.
T21 intersects T22 at the northern tennis courts.
Trail 21 Ends at Larkview. This is not consistent with the county trail plan which shows this as continuous. Continuing this trail as shown in the county trail plan would be very difficult and of little value because the there is a county trail running parallel to trail 21 along Rt 123.