Block Top is right next to Islet in the Sky.
The tower can be approached from the White Rim (drive past Monster Tower until you spot Block Top and Islet on the right) or from above (harder to find but the easier approach - use maps).
Browse More Classics in Block Top Tower
Mountain Project's determination of some of the classic, most popular, highest rated routes for Block Top Tower:
Block Top 5.9+ C2+ Trad, Aid, 4 pitches, 450 feet, Grade III
Featured Route For Block Top Tower