What happens when the wind is too weak to sustain a glider at ridge top? You will settle down lower and lower, until you almost get down to ridge top. Then, you will immediately have to leave the ridge and head toward a landing option.
This process happens very quickly. If you’re 400 ft above the mountain and the ridge is not working, you will be down at ridge top in as little as two minutes. The trees will be filling in your canopy very rapidly.
Note that you will NOT settle into an “equilibrium point”. No matter how low and slow you get, you will NOT sustain at ridge top.
Maintain your airspeed at least at Best Glide Speed with the ridge coming up at you, it will be tempting to pull back to keep the nose level with the mountain. Watch your airspeed like a hawk and don’t be tempted to pull that stick back and get any slower.
Plan on leaving the ridge at 150ft above the trees. Settling down lower and slower will rarely help you and yet the risk of doing so is very high.
Once you leave the ridge, transition immediately into a landing mindset. You will be down on the ground in the next 2-4 minutes. Take a deep breath. Do your landing checklist. Focus on making a nice landing.