The person at the center of this case
Jonathan Mark McNabb
Missing Person · Open
28 years waiting · since 1998
Missing Person: Jonathan Mark McNabb
Justice for Jonathan Mark McNabb — the trail went cold in 1998, but the truth hasn't.
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Key leads to think about
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location
Lead #1What happened along the Colony Mill Trail between the drop-off point and the park boundary?
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evidence
Lead #2Why did the extensive search with helicopters, dogs, and ground teams yield no definitive sign of Mark?
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timeline
Lead #3Could Mark have become lost, injured, or encountered foul play during the hike?
Jonathan Mark McNabb, a 28-year-old hiker, disappeared on February 7, 1998, after setting out on a solo hike from Three Rivers, California toward Sequoia National Park's Lodgepole area via the Colony Mill Trail. He was reported overdue on February 9th, and despite an extensive multi-agency search involving helicopters, ground teams, and dogs, no definitive trace of him was found. Nearly three decades later, the circumstances of his disappearance remain unknown, and investigators continue to seek any information about what happened to Mark during or after his hike.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
👁️
witness
Lead #4Were there any hikers or park visitors in the area on February 7-8, 1998 who might have seen Mark?
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Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
NamUs case MP128174. Missing person: Jonathan Mark McNabb.
Last known contact: 1998-02-07 in Three Rivers, Tulare, CA. Circumstances: Mark McNabb was last seen on February 7, 1998, when he was dropped off just north of the intersection of North Fork Drive and Shepherd Saddle Road in the town of Three Rivers, CA.
Mark intended to hike to the Lodgepole area of Sequoia National Park via the Colony Mill Trail and return to his home on North Fork Drive on February 8th. On February 9, 1998, at approximately 2:00pm, Sequoia National Park Rangers were notified that Mark was overdue from his hike.
Mark was approximately 1.5 miles outside the park boundary when he was last seen. On February 10, 1998, a multi-agency search and rescue effort was undertaken including helicopters, ground search teams, and search dogs.
The search yielded no definitive sign of Mark. Demographics: 28 years, Male, White / Caucasian.
Physical description: 5 ft 8 in, 125 lbs, hair: Brown, eyes: Brown. Clothing and accessories: Accessories: Black baseball cap, dark duffel bag; Clothing: Dark blue ski jacket and black levis; Footwear: Black leather hiking boots.
Investigating agency: National Park Service - Sequoia and Kings Canyon | 800038.
Timeline of Events
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1998-02-07
Last seen at North Fork Drive and Shepherd Saddle Road
Mark was dropped off just north of the intersection and intended to hike to Lodgepole area via Colony Mill Trail, planning to return home on February 8th
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1998-02-09
14:00Reported overdue
Sequoia National Park Rangers were notified that Mark was overdue from his hike
🕵️
1998-02-10
Multi-agency search and rescue launched
Search effort included helicopters, ground search teams, and search dogs; Mark was approximately 1.5 miles outside the park boundary when last seen
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:February 7, 1998
Last Updated:May 20, 2026
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Phone: 5595654228
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Case Information
Incident:February 7, 1998
Last Updated:May 20, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 5595654228
You can remain anonymous