Leadville, Colorado. Burro race 21 mile burro race feature of 4th annual "Boom Days" Friday thru Sunday. Post Jy 30, 1973 p.21 Steve Mathews wins race to Mosquito Pass and back in 2 hours and 36 minutes. Post Ag 6, 1973 p.4 Joe Glavnick wins burro race to top of Mosquito Pass and back in 2 hours 33 minutes in 25th annual Leadville Burro Race. RMN Ag 5, 1974 p.61 Joe Glavinick of Leadville wins annual race. EMr1 Ag 8, 1977 P-35 Post Ag 8, 1977 p.27
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