Lima 42K

This race works best for trail runners comfortable with technical terrain and those seeking a genuinely low-key marathon experience. The flat to gently rolling course through Lima's trail system means you won't suffer massive elevation, which appeals to runners who want to test themselves on trails without the lung-busting climb. If you're based in or accustomed to running at low elevation, you'll have an advantage here. Trail marathons in Peru aren't crowded road races, so you need to be self-sufficient and genuinely interested in exploring local terrain rather than chasing a fast time on a predictable route. This suits experienced trail runners over road racers expecting marked aid stations every few kilometers. The real challenge on this course is the surface itself. Trail running at marathon distance demands different pacing and energy expenditure than asphalt, and your legs will feel the constant micro-adjustments even on gentle grades. May is autumn in Lima, which means you're running during reasonably cool, dry weather, but the trail surface can be rough and unforgiving on your joints after thirty kilometers. The elevation ranges from near sea level to 126 meters, which sounds modest until you're managing technical footing on tired legs. You should expect minimal infrastructure typical of many South American trail races, so arrive prepared with whatever support you might need. The course itself is the attraction here, not a fast time, and that's worth considering before you enter.