Layer Estimates:

Layer: US Cities over 50,000 (ID:1)
Count: 170
Extent:

XMin: -17557432.5393956
YMin: 2427387.84337525
XMax: -7900622.56032282
YMax: 6066423.73402891
Spatial Reference: 102100 (3857)

Layer: Exercise Programs (ID:2)
Count: 970
Extent:

XMin: -17571336.3437551
YMin: 2034540.62408318
XMax: -7309115.31404647
YMax: 9565121.92280788
Spatial Reference: 102100 (3857)

Layer: States boundaries (ID:3)
Count: 51
Extent:

XMin: -19839092.300133
YMin: 2145729.6851738
XMax: -7454985.15054977
YMax: 11542624.9015025
Spatial Reference: 102100 (3857)