Rock Mountain Jail Overview
Rock Mountain Detention Facility is operated by the San Diego County Sheriff's Office at 446 Alta Road, Suite 5400, San Diego, CA 92158. It is part of the Otay Mesa group of custody facilities, an area where readers often confuse a Sheriff jail, a CDCR prison, and ICE detention because the addresses sit close together. Rock Mountain is the Sheriff facility in this set. Its county custody records are searched through the Sheriff's Who's In Jail system, and the centralized custody information line is (619) 409-5000.
The facility has a distinct life cycle. The Sheriff's page says construction was completed in 2000, then the site was leased to the federal government and operated by Corrections Corporation of America for its first 15 years. It returned to the Sheriff in 2016. Renovations began in 2019, and House 1 opened in July 2023 to house 200 individuals. That history matters because older web references may describe a federal or private-contract use, while the current facility map identifies Rock Mountain Detention Facility as a San Diego County Sheriff's Office maximum-security county jail.
Rock Mountain Capacity
Capacity figures for Rock Mountain Detention Facility should be read with source and date attached. The Sheriff's facility narrative describes the opened House 1 capacity as 200 people when the renovated unit opened in July 2023. The BSCC rated-capacity workbook updated April 24, 2026 lists Rock Mountain at 600 rated beds. Those two numbers are not interchangeable. One describes the first renovated house that reopened; the other is the broader rated-capacity entry reported through statewide jail-capacity data.
Live same-day population was not captured from the Sheriff's Daily Population Report. For a current housing answer, use the inmate's roster detail and then call the facility through the Sheriff's custody information line if the location, release date, or transfer status matters before travel.
Rock Mountain Roster Lookup
Rock Mountain Detention Facility uses the San Diego Sheriff jail roster, not CDCR CIRIS, the BOP locator, or ICE ODLS. Start with San Diego Sheriff Who's In Jail. The visible search form requires a last name and first name with at least two characters in each field. The Lookup button stays disabled until the Cloudflare Turnstile human-verification step completes. The Sheriff's page also warns that the website is normally taken offline each Wednesday at noon for about 30 minutes.
- Open the Sheriff's Who's In Jail search and enter the person's first and last name.
- Complete the human-verification step so the Lookup button becomes active.
- Open the matching profile and check the facility, housing area, booking number, bail status, and projected release field.
- Call (619) 409-5000 and select the facility if the record conflicts with what the family was told or if a release date must be confirmed.
The roster is best for current county jail custody. A person sentenced to state prison should be searched in CDCR CIRIS. Federal custody uses BOP, and civil immigration detention uses ICE ODLS. For county booking records that are not online, use the Sheriff's Records & ID Division, the Public Records Center, or the Records Service Request Form. More detail on the roster fields appears on the San Diego County jail inmate records page.
Rock Mountain Contact Card
Use the facility contact for custody confirmation, visiting questions, and facility-specific directions. The Sheriff's Office centralized detention line handles all Sheriff detention facilities, so callers should select the Rock Mountain option when prompted. Records requests for old reports or booking records are routed through Sheriff's Records & ID rather than through a housing deputy.
Rock Mountain Detention Facility
446 Alta Road, Ste. 5400
San Diego, CA 92158
(619) 409-5000
Custody information line, select the desired facility.
Rock Mountain Visit Rules
Rock Mountain Detention Facility follows the Sheriff's social-visit reservation system. The research notes five in-person visiting days per week, no Tuesday or Wednesday visits, and a 60-minute check-in requirement for this facility. Reservations are made in advance through the centralized line or eVisit where available. Same-day scheduling is not allowed. Visitors age 18 or older need valid identification, and minors must be with a parent, court-appointed guardian, or adult with legal custody.
| Visit item | Rock Mountain rule |
|---|---|
| In-person availability | Five days per week; no Tuesday or Wednesday visits. |
| Check-in | Arrive 60 minutes before the scheduled visit. |
| Reservations | Schedule in advance through (619) 409-5000 or eVisit where available. |
| Video visits | Available 7 days through SmartInmate or Smart Communications. |
| Limit | Two video visits per week, 30 minutes each. |
Visits may be changed or canceled for rule violations, movement, security needs, or housing changes. People on probation or parole must request authorization before scheduling a visit.
Rock Mountain Mail Money
Mail for Rock Mountain Detention Facility follows the county jail mail process. The Sheriff's mail source says envelopes and packages must include the incarcerated person's name, booking number, facility, sender name, and return address. The booking number comes from Who's In Jail. The mail processing address is in Santee, even when the person is housed at Rock Mountain in Otay Mesa, and mail sent directly to detention facilities can be rejected or returned.
| Service | Provider or detail |
|---|---|
| Mail address | Mail Processing Center, 451 Riverview Parkway, Building C, Santee, CA 92071. |
| Phone calls | Facility calls may display 727-349-1561 because of the Sheriff's phone provider notice. |
| Video visits | SmartInmate / Smart Communications / Corrections Communications Services. |
| Money deposits | San Diego Sheriff Commissary e-commerce site; no specific fee was captured. |
| Commissary | Food, hygiene, stationery, reading glasses, and personal items; pricing described as comparable to convenience store pricing. |
Mail is opened, inspected, and searched. Legal mail is checked for contraband but is not read. Commissary purchases use the incarcerated person's account funds, and Sheriff research notes that profits go to the Incarcerated Persons' Welfare Fund under California Penal Code section 4025.
Rock Mountain Booking Status
Rock Mountain is not described as the primary San Diego County intake point. Newly booked male arrestees are often associated with San Diego Central Jail, while female intake is associated with Las Colinas, and North County intake is associated with Vista. Rock Mountain serves maximum-security county custody after classification or transfer within the Sheriff's system. The booking workflow still matters because a roster record may show the arresting agency, booking number, bail status, housing location, charge rows, and projected release field after the Sheriff's system has enough data to display the person.
The Sheriff's intake material describes photograph, booking number, search, medical screening, vital-sign clearance, wristbanding, property handling, phone access, Live Scan fingerprints, and classification. If a person is medically or psychiatrically unable to continue through jail booking, the arresting officer may need to seek outside treatment or clearance before booking resumes. For Rock Mountain custody, the key public check is whether the roster profile lists the facility as the current location.
Rock Mountain Caveats
Rock Mountain Detention Facility sits near other Otay Mesa custody sites, including George Bailey Detention Facility, East Mesa Reentry Facility, Richard J. Donovan Correctional Facility, and Otay Mesa Detention Center. The locator changes by operator. Rock Mountain is Sheriff county custody. RJD is CDCR state prison custody. Otay Mesa Detention Center is ICE custody. Nearby addresses do not mean one roster covers every person held in the area.
Note: Confirm custody, housing, and visit status with the Sheriff's line before traveling to Rock Mountain Detention Facility.