Layer Estimates:

Layer: Trailheads (ID:14)
Count: 396
Extent:

XMin: -17393783.9823296
YMin: 2189752.61635578
XMax: -7576422.35450872
YMax: 9283192.21057299
Spatial Reference: 102100 (3857)

Layer: Trails (ID:5)
Count: 391
Extent:

XMin: -17393724.0285
YMin: 2186211.7728
XMax: -8576294.4315
YMax: 9283866.2247
Spatial Reference: 102100 (3857)