Trail Running/Walking alternatives

12 exercises that train the quads like the Trail Running/Walking does. Different equipment first.

ExerciseEquipmentAlso works
BicyclingOtherCalves, Glutes, Hamstrings
Bicycling, StationaryMachineCalves, Glutes, Hamstrings
Elliptical TrainerMachineCalves, Glutes, Hamstrings
Jogging, TreadmillMachineGlutes, Hamstrings
Recumbent BikeMachineCalves, Glutes, Hamstrings
Rope JumpingOtherCalves, Hamstrings
Rowing, StationaryMachineBiceps, Calves, Glutes, Hamstrings, Lower back, Middle back
Running, TreadmillMachineCalves, Glutes, Hamstrings
SkatingOtherAbductors, Adductors, Calves, Glutes, Hamstrings
StairmasterMachineCalves, Glutes, Hamstrings
Step MillMachineCalves, Glutes, Hamstrings
Walking, TreadmillMachineCalves, Glutes, Hamstrings