Last week, the Canadian climber Miles Adamson completed the first boulder ascent of the slab face of Bishop’s Grandma Peabody boulder. The line is called Too Tall to Fall (V10). Too Tall to Fall shares terrain with Dan Beall’s Tiers of Uncertainy, a 5.14 toprope, before moving out left to connect to 5.9 terrain on the arete. On instagram Adamson wrote, “I hope one day Tiers proper is bouldered, it would be the boldest highball in the world. For now, taking a hard left where the wall gets steep makes this line similar to Too Big to Flail.” Watch the ascent in the video above. Too Tall to Fall begins around 3:30.