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Mark Bosworth Missing Person Case

Last seen in Riddle, Oregon on Sep 16, 2011

Victim Details

Created

Sep 19, 2011

Case Added

Jan 05, 2024

Firstname

Mark

Lastname

Bosworth

Current Age

Age At Disappearance

Height

72 inches

Weight

180 lbs

Ethnicity

White / Caucasian

Gender

Male

Last Seen

Sep 16, 2011

City

Riddle

State

Oregon

County

Douglas County

Tribal Land

Agency ID

10779

Agency Name

Douglas County Sheriff's Office

Agency City

Roseburg

Agency State

Oregon

Agency County

Douglas County

Agency Zip Code

97470

Agency Contact

Brad O'Dell

Contact Job Title

Sergeant

Agency Address

1036 Southeast Douglas Avenue, Oregon

Agency Phone

5414404450

Agency Jurisdiction

County

Agency Type

Law Enforcement

Agency Website

https://www.dcso.com/

Agency Case #

11-3534

Agency Report Date

2011-09-17

Primary Agency

Douglas County Sheriff's Office

Hair Color

Gray or Partially Gray

Left Eye Color

Blue

Right Eye Color

Blue

Last Updated

07/07/2026

Area Last Seen:

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Case Description

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In the late hours of September 16, 2011, 54-year-old Mark Lawrence Bosworth, a husband and father of two from the Portland area, vanished into the night from the small town of Riddle, Oregon. He was volunteering at the popular Cycle Oregon bicycle tour, an event he had been a part of for several years. Friends last saw him around 11:00 p.m. near Riddle High School, where the event's campsite was located. He mentioned he was heading to his tent for the night but never arrived. Left behind we ...

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Last Seen: Sep 16, 2011

Links to Additional Sources (11)

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Missing Person / NamUs #MP12337

Cycle Oregon volunteer Mark Bosworth vanished 5 years ago

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Mark Bosworth Missing Person Case

Last seen in Riddle, Oregon on Sep 16, 2011

Victim Details

View Videos (2)

Unlock 1 additional case video

Case Description

Continue reading the complete case summary

Links to Additional Sources (11)

Unlock 9 additional sources

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