Canadian skyrunner goes missing during training session for Matterhorn record attempt
Canadian athlete Kalie McCrystal has gone missing during preparations for a record attempt in the Alps.

TL;DR
- Canadian athlete Kalie McCrystal has gone missing in the Alps.
- She was training for a record attempt to ascend and descend the Matterhorn.
- McCrystal was last seen on Tuesday descending the Italian side of the Matterhorn.
- A helicopter search has been called off after failing to locate her.
- Skyrunning involves running and scrambling at altitudes over 6,600ft.
- McCrystal has extensive experience in high-altitude and technical mountain terrain.