Calf stretches that also stretch the hamstrings. These stretches can be painful but effective.
Calf Stretch Illustrated Exercise Guide
Calf Stretches for Tight Calves - Gasctrocnemius
Exercises used for stretching on quadriceps (A), hamstring (B) and calf
Calf Stretches - Active Chiropractic
How to Do a Towel Calf Stretch: Techniques, Benefits, Variations
Calf Stretches
Lower Leg Exercises Seated Calf Stretch
Plantar fasciitis stretches: 6 exercises for heel pain relief
Calf Stretches
Calf Stretches - Free Lower Body Workout by Alysia G. - Skimble
WMC's Guide to Stretching Calf Muscles
Best Calf Stretches
6 Best Calf Stretches - How to Stretch Your Calves
5 best calf stretches for runners
Yoga for Tight Calves