Trail runner faces federal misdemeanor after Grand Teton 'shortcut' during record run

Michelino Sunseri, a 32-year-old trail runner from Idaho sponsored by The North Face, has been referred for federal prosecution after park officials concluded he left designated trails during a record-setting run on Wyoming’s Grand Teton.

Sunseri drew widespread attention last year when he recorded a round-trip time from the trailhead to the summit of the Grand Teton and back of two hours, 50 minutes and eight seconds, eclipsing a 12-year-old mark. The National Park Service said review of Strava GPS data showed Sunseri cut across a switchback on his descent rather than remaining on the established trail, a practice that is prohibited in national parks to prevent erosion and protect resource values.

The NPS referred the case to federal prosecutors, which can pursue misdemeanor charges for leaving designated trails on federal lands. The agency also notified the Fastest Known Time (FKT) organization, which has since vacated Sunseri’s listing on its records for taking a route that did not follow the established trail.

Park officials have said that strict trail use rules are intended to reduce erosion, protect vegetation and cultural resources, and protect public safety. The referral and potential prosecution underscore the agency’s stated intent to enforce those rules even when alleged violations involve high-profile athletes and widely publicized performances.

Sunseri’s time had been celebrated in the endurance-running community for its speed and for breaking a long-standing benchmark on the route near Jackson Hole. The disclosure of his GPS tracks and the subsequent review prompted debate among trail runners and land managers about route reporting, verification and the consequences of deviating from designated paths in protected areas.

The case has generated attention beyond the specialty running press. Media reports have said the matter attracted scrutiny at higher levels of government, including reported efforts by White House officials to intervene on the athlete’s behalf. NPS officials confirmed only that the agency conducted an investigation and referred the case for federal review; they did not comment on any outside contacts or interventions.

FKT, which documents and verifies fastest-known times on established routes worldwide, said it vacated the result after being notified by the NPS that the route did not conform to the defined standard for the Grand Teton route. The organization’s decisions on listings are based on route conformity and verifier reports, and it removed Sunseri’s time pending resolution of the matter with federal authorities.

Sunseri’s sponsor, The North Face, listed him as one of its athletes; the company did not provide a public statement to park officials’ findings at the time of the referral. Sunseri has not publicly responded to the referral and potential charges in released statements reviewed by reporters.

The timeline begins with the run last year, the subsequent publication of GPS data that highlighted the deviation, the NPS investigation and ultimately the referral for federal prosecution. Officials have said federal misdemeanor charges for leaving a designated trail may carry penalties specified under laws governing conduct in national parks, including fines and potential jail time, though they have not detailed the specific charge or sentencing exposure in this case.

The incident highlights tensions between athletic pursuit and land-management rules on public lands. Trail-running events and record attempts often rely on public trails and routes, and land managers say consistent enforcement of trail regulations is necessary to protect fragile alpine environments. The NPS statement emphasized that enforcement actions are taken to uphold park protections for present and future visitors.

Federal prosecutors will now decide whether to bring charges and what those charges will be. Until charging decisions are announced and any court proceedings occur, the facts outlined by the NPS and the FKT action remain the basis for the referral and the vacating of the recorded time.