Can Pind Daan be done at Badrinath only during Pitrupaksha?

No — Pind Daan at Brahmakapal in Badrinath can be performed any time during the pilgrimage season (May to November, when Badrinath is accessible). Pitrupaksha is the most auspicious window, but families who cannot visit during Pitrupaksha can still access the full spiritual benefit of Brahmakapal Pind Daan on any day during the open season.