Marble Falls, United States of America · Friday 27 November 2026
COLORADO RIVER RUN Run to the River Out here on these trails, not all who wander are lost, some are simply finding their strength. 100 MILES 50 MILES, 10 MILES & 5 MILES 50K & MARATHON HALF MARATHON 10K & 5K An invigorating trail adventure at Turkey Bend Park Connect with Nature, Challenge Your Endurance Set along the scenic banks and trails surrounding the majestic Colorado River at Turkey Bend Park, this event offers a unique opportunity to connect with nature while testing your limits. Run through diverse landscapes, including riverbanks, rugged trails, and serene natural habitats as you embrace the spirit of outdoor adventure. The Colorado River Run promises to be a memorable experience for runners and nature enthusiasts alike. The course layout is designed to highlight the river s most picturesque spots while providing a challenging terrain for runners of all levels, from competitive athletes seeking to set personal records to recreational runners looking for a unique trail experience. Register by November 7, 2026 to guarantee your race shirt! Reserve an 8-person camping spot here Race Distances 100 Mile Ultramarathon Start Time: 8:00 AM Cut-off: 39 hours The ultimate river trail adventure for endurance athletes 50 Mile Ultramarathon, 10 Miler, 5 Miler Start Time: 8:00 AM Cut-off: 36 hours Challenge yourself with breathtaking river views 50K & Marathon (26.2 miles) Start Time: 8:30 AM Cut-off: 12 hours Classic distance with unforgettable scenery Half Marathon (13.1 miles) Start Time: 8:30 AM Cut-off: 9 hours Perfect distance to enjoy the river trails 10K (6.2 miles) | 5K Run/Walk (3.1 miles) Start Time: 8:30 AM Cut-off: 9 hours Family-friendly option - children can accompany registered parents for free! Course Description Scenic River Trails The course is designed to highlight the Colorado River s most picturesque spots while providing a challenging terrain for runners. You ll experience diverse landscapes, including riverbanks, rugged trails, and serene natura
Adjusted Time
1:40:47
Time difference: -4.2 minutes compared to a flat, road, temperate course.
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K is a half marathon held in Marble Falls, United States of America, scheduled for Friday 27 November 2026. The course is run on road surface with 0m of total elevation gain, reaching a maximum altitude of 0m above sea level. For registration and full race details, visit the official Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K website.
This is a very flat course with only 0m of total elevation gain across the full distance. The course ranges from 0m to 0m above sea level — a 0m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based half marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K against other half marathons to find the right race for your goals.
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