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 #1Why was Mark last seen 1.5 miles outside the park boundary? Did he become lost or disoriented before reaching the main trail?
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evidence
Lead #2What physical evidence, if any, was found along the Colony Mill Trail or in the surrounding area during the initial search?
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witness
Lead #3Were there any other hikers or park visitors in the area on February 7-8, 1998 who might have seen Mark or noticed anything unusual?
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 an extensive multi-agency search involving helicopters, ground teams, and dogs found no definitive trace of him. Nearly three decades later, the circumstances of his disappearance remain unknown, and anyone with information about his whereabouts or what may have happened during that hike is urged to come forward.
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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.
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clue
Lead #4Mark was wearing distinctive clothing (dark blue ski jacket, black Levis, black baseball cap) and carrying a dark duffel bag—did anyone report seeing someone matching this description in the weeks following 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
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1998-02-07
Last seen departing for hike
Mark McNabb was dropped off just north of the intersection of North Fork Drive and Shepherd Saddle Road in Three Rivers, CA, intending to hike to Lodgepole area via Colony Mill Trail.
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1998-02-08
Expected return date
Mark intended to return to his home on North Fork Drive on this date.
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1998-02-09
14:00Reported overdue
Sequoia National Park Rangers were notified at approximately 2:00 PM that Mark was overdue from his hike.
🕵️
1998-02-10
Multi-agency search initiated
Search and rescue effort began involving helicopters, ground search teams, and search dogs, but yielded no definitive sign of Mark.
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