Denver's reputation as one of America's most dog-friendly cities isn't just marketing—it's backed by real numbers. With approximately 50% of residents owning at least one dog and an estimated 160,000 dogs calling the Mile High City home, Denver actually has more dogs than children under 18. But Denver's weather can be extreme, from scorching summer days reaching 105°F to bone-chilling winter temperatures dropping as low as -29°F. This comprehensive guide explores the top 10 indoor dog parks in Denver, offering climate-controlled havens where your pup can run, play, and socialize year-round regardless of Colorado's unpredictable weather.