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
📍
location
Lead #1Why was no trace found 1.5 miles outside the park boundary despite extensive helicopter and ground searches?
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evidence
Lead #2What happened to Mark's dark duffel bag, black baseball cap, dark blue ski jacket, and black leather hiking boots?
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witness
Lead #3Did anyone see Mark on the Colony Mill Trail or in the surrounding area on February 7-8, 1998?
Jonathan Mark McNabb, a 28-year-old hiker, disappeared on February 7, 1998, after setting out from Three Rivers, California to hike the Colony Mill Trail toward Sequoia National Park's Lodgepole area. 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 has been found. His fate remains unknown, and investigators continue to seek information about what happened during his solo mountain 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.
💡
clue
Lead #4Were there any signs of injury, wildlife encounter, or disorientation that might explain his disappearance?
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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
👁️
1998-02-07
Last Seen
Mark McNabb dropped off just north of North Fork Drive and Shepherd Saddle Road intersection in Three Rivers, CA. He intended to hike to Lodgepole area via Colony Mill Trail.
⏰
1998-02-08
Expected Return
Mark was expected to return to his home on North Fork Drive on this date.
🕵️
1998-02-09
14:00Reported Overdue
Sequoia National Park Rangers notified that Mark was overdue from his hike, approximately 1.5 miles outside park boundary.
🕵️
1998-02-10
Search and Rescue Launched
Multi-agency search and rescue effort undertaken including helicopters, ground search teams, and search dogs. No definitive sign of Mark found.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:February 7, 1998
Last Updated:June 1, 2026
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Phone: 5595654228
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Case Information
Incident:February 7, 1998
Last Updated:June 1, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 5595654228
You can remain anonymous