Sarah Bartlett is a Tableau consultant who created Iron Quest to help people practice for the annual Iron Viz data visualization competition. Iron Quest provides topics and data for participants to build visualizations and receive feedback to improve. Over 300 entries have been submitted across 10 challenges since Iron Quest launched in 2019. The challenges help prepare participants for Iron Viz qualifiers by focusing on the scoring criteria and providing a safe space for learning. Participant testimonials show how Iron Quest has helped boost their confidence and skills for competing in Iron Viz. Upcoming Iron Quest challenges will focus on mobile design and mythological themes.