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Aerial view of Mullen High School
Aerial imagery: U.S. Geological Survey (public domain). USGS

Catholic high school

Mullen High School

  • LocationDenver, CO
  • Type and sizeIndependent Catholic school · Grades 9–12 · 753 students
Official website

Mullen High School is a Catholic, college preparatory school in the Lasallian tradition at 3601 South Lowell Blvd. in Denver. Its website describes retreats at every grade level, a 70-hour service requirement, and school Masses with a music group.

Catholic churches nearby

Map of Mullen High School, its Catholic center and nearby Catholic churches1 mi2 mi3 miHoly Name Catholic Church: 0.6 mi1All Saints Catholic Church: 1.5 mi2Notre Dame Catholic Church: 1.9 mi3Saint Louis Catholic Church: 2.8 mi4Lasallian Ministries (Pastoral Office), Mullen High School: 0.1 miMullen High School (campus)N1 mi
CampusCatholic centerCatholic church (numbered below)Open a street map ›
  1. Holy Name Catholic Church — 0.6 mi · 3290 West Milan Avenue, Denver
  2. All Saints Catholic Church — 1.5 mi · 2559 South Federal Boulevard, Denver
  3. Notre Dame Catholic Church — 1.9 mi · 2190 South Sheridan Boulevard, Denver
  4. Saint Louis Catholic Church — 2.8 mi · 3310 South Sherman Street, Englewood

Within 3 miles, as mapped by OpenStreetMap contributors. The map may be incomplete. Confirm with the parish or diocese.

Faith scorecard

Each line is one thing we looked for. A check means yes, a half means partly, a dash means no. “Not enough information” means official sources did not say.

N/ASacramental life: Not enough information. Official sources do not cover enough of this to grade it yet.

Sacramental life

Not enough information: official sources cover less than 60% of this area.

  • Partly: the school meets some of this item and earns part of the points.
    All-school or class Masses during the school yearA few times a year (School Masses are confirmed.)
    Sources (2)
    1. Faith and Community at Mullen High School | Lasallian Ministriesmullenhigh.com/life-at-mullen/lasallian-ministries · verified Oct. 12, 2026
      “our school liturgical celebrations, including Mass, prayer together, and celebration of the sacraments.”
      School liturgical celebrations, including Mass, are part of the school's faith life; no frequency is stated.
    2. Getting Involved | Mullen High Schoolmullenhigh.com/life-at-mullen/getting-involved · verified Oct. 12, 2026
      “This group is composed of students and faculty members who plan and provide vocal and instrumental music at all school Masses, prayer services”
      A music group plans and provides music at all school Masses and prayer services.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Daily Mass available to students on campusNot enough information: not found in official sources.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Confession offered to students during the school yearNot enough information: not found in official sources.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Eucharistic adoration offeredNot enough information: not found in official sources.
  • Partly: the school meets some of this item and earns part of the points.
    Priest chaplain serving the schoolVisiting or shared priest (School Masses are confirmed.)
    Sources (2)
    1. Faith and Community at Mullen High School | Lasallian Ministriesmullenhigh.com/life-at-mullen/lasallian-ministries · verified Oct. 12, 2026
      “our school liturgical celebrations, including Mass, prayer together, and celebration of the sacraments.”
      School liturgical celebrations, including Mass, are part of the school's faith life; no frequency is stated.
    2. Getting Involved | Mullen High Schoolmullenhigh.com/life-at-mullen/getting-involved · verified Oct. 12, 2026
      “This group is composed of students and faculty members who plan and provide vocal and instrumental music at all school Masses, prayer services”
      A music group plans and provides music at all school Masses and prayer services.
N/ATheology and curriculum: Not enough information. Official sources do not cover enough of this to grade it yet.

Theology and curriculum

Not enough information: official sources cover less than 60% of this area.

  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Years of theology or religion requiredNot enough information: not found in official sources.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Theology courses follow the USCCB Curriculum FrameworkNot enough information: not found in official sources.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Philosophy, apologetics, or ethics course offeredNot enough information: not found in official sources.
  • Yes: the school meets this item and earns its full points.
    Faith integrated across the curriculum (stated in the program of studies or mission)Yes (The curriculum page describes the academic experience as rooted in the Lasallian Catholic mission.)
    Sources (1)
    1. Mullen High School Curriculum | Academicsmullenhigh.com/academics/curriculum · verified Oct. 12, 2026
      “At the heart of the academic experience at Mullen High school is our commitment to our Lasallian Catholic mission”
      The curriculum page states that the academic experience is rooted in the Lasallian Catholic mission.
ACampus culture: Strong (grade A): 85 to 100 points out of 100 on what official sources document. Grades need sources for at least 60% of the checklist.

Campus culture

100 of 100 points on what we could document.

  • Yes: the school meets this item and earns its full points.
    RetreatsA retreat for every grade (Retreats are offered at all grade levels: day retreats in freshman and sophomore years, Kairos as juniors, and an end-of-year retreat as seniors.)
    Sources (1)
    1. Retreats | Mullen High Schoolmullenhigh.com/life-at-mullen/lasallian-ministries/retreats · verified Oct. 12, 2026
      “We offer retreats at all grade levels”
      Retreats are offered at all grade levels.
      “As juniors, each student has the opportunity to attend Kairos! It is a four day retreat”
      Juniors have the opportunity to attend a four-day Kairos retreat.
      “as Seniors, students have the chance to attend an end of the year retreat”
      Seniors have the chance to attend an end-of-year retreat.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Campus ministry staffNot enough information: not found in official sources.
  • Yes: the school meets this item and earns its full points.
    Faith-based student groups or clubsTwo or more (Faith Service Community and Lasallian Youth are listed.)
    Sources (1)
    1. Getting Involved | Mullen High Schoolmullenhigh.com/life-at-mullen/getting-involved · verified Oct. 12, 2026
      “Faith Service Community. Meetings Every Tuesday at lunch in the S41.”
      The Faith Service Community meets every Tuesday at lunch in room S41.
      “Lasallian Youth is open to all students. It offers the student a variety of opportunities to minister to the economically poor through direct service”
      Lasallian Youth is open to all students and offers direct service and prayer activities.
  • Yes: the school meets this item and earns its full points.
    Daily prayer and liturgical life built into the school dayYes (Prayer and liturgy are described as part of school life, including prayer at the beginning of every class.)
    Sources (1)
    1. Faith and Community at Mullen High School | Lasallian Ministriesmullenhigh.com/life-at-mullen/lasallian-ministries · verified Oct. 12, 2026
      “at the beginning of every prayer, and at the beginning of every class, is key to our Lasallian Catholic spirituality”
      Remembering God's presence at the beginning of every prayer and every class is described as key to Lasallian Catholic spirituality.
      “our school liturgical celebrations, including Mass, prayer together, and celebration of the sacraments.”
      School liturgical celebrations, including Mass, are part of the school's faith life; no frequency is stated.
N/AService and Catholic social teaching: Not enough information. Official sources do not cover enough of this to grade it yet.

Service and Catholic social teaching

Not enough information: official sources cover less than 60% of this area.

  • Yes: the school meets this item and earns its full points.
    Required service hours40 or more hours over four years (70 total service hours are required, which is 40 or more over four years.)
    Sources (1)
    1. Community Service Learning | Mullen High Schoolmullenhigh.com/life-at-mullen/service-learning · verified Oct. 12, 2026
      “you are required to complete 70 total hours of service”
      Students are required to complete 70 total hours of service.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Catholic social teaching taught in theology coursesNot enough information: not found in official sources.
  • Not enough information: official sources do not document this, so it is left out of the grade rather than counted as a no.
    Pro-life engagement (club, March for Life, or similar)Not enough information: not found in official sources.
  • Yes: the school meets this item and earns its full points.
    Justice and solidarity programs (immersions, service trips, justice clubs)Yes (Service immersion trips and Lasallian Youth direct service are listed.)
    Sources (2)
    1. Community Service Learning | Mullen High Schoolmullenhigh.com/life-at-mullen/service-learning · verified Oct. 12, 2026
      “Service Immersion Trips are a great opportunity for students to immerse themselves in different types of cultures”
      Service immersion trips are offered to students.
    2. Getting Involved | Mullen High Schoolmullenhigh.com/life-at-mullen/getting-involved · verified Oct. 12, 2026
      “Lasallian Youth is open to all students. It offers the student a variety of opportunities to minister to the economically poor through direct service”
      Lasallian Youth is open to all students and offers direct service and prayer activities.

Grades come from the documented indicators under the published rubric. “Not enough information” does not mean the school lacks it.

Strengths

  • Retreats are offered at every grade level, including a four-day Kairos retreat for juniors.
    Sources (1)
    1. Retreats | Mullen High Schoolmullenhigh.com/life-at-mullen/lasallian-ministries/retreats · verified Oct. 12, 2026
      “We offer retreats at all grade levels”
      Retreats are offered at all grade levels.
      “As juniors, each student has the opportunity to attend Kairos! It is a four day retreat”
      Juniors have the opportunity to attend a four-day Kairos retreat.
  • Students are required to complete 70 hours of service, and service immersion trips are offered.
    Sources (1)
    1. Community Service Learning | Mullen High Schoolmullenhigh.com/life-at-mullen/service-learning · verified Oct. 12, 2026
      “you are required to complete 70 total hours of service”
      Students are required to complete 70 total hours of service.
      “Service Immersion Trips are a great opportunity for students to immerse themselves in different types of cultures”
      Service immersion trips are offered to students.
  • Faith-based student groups include Faith Service Community and Lasallian Youth.
    Sources (1)
    1. Getting Involved | Mullen High Schoolmullenhigh.com/life-at-mullen/getting-involved · verified Oct. 12, 2026
      “Faith Service Community. Meetings Every Tuesday at lunch in the S41.”
      The Faith Service Community meets every Tuesday at lunch in room S41.
      “Lasallian Youth is open to all students. It offers the student a variety of opportunities to minister to the economically poor through direct service”
      Lasallian Youth is open to all students and offers direct service and prayer activities.

Concerns

None recorded.

Know something we missed? Suggest a correction.

Campus ministry home

Lasallian Ministries (Pastoral Office), Mullen High School

  • Address: 3601 South Lowell Blvd., Denver, CO 80236
  • Location: On campus
  • Facilities: De La Salle Chapel

View on map ↗

Source: mullenhigh.com, verified Oct. 12, 2026, mullenhigh.com, verified Oct. 12, 2026, mullenhigh.com, verified Oct. 12, 2026

Catholic clubs and student life

5 groups and regular activities · 1 on campus, 1 off campus, 3 location not published

Service 2

  • Service immersion tripsOff campus
    Trips include La Puente Shelter in Alamosa, Colorado, a border and immigration trip to Tucson, Arizona, and Mexico, and a trip to the Blackfeet Indian Reservation in Montana. Applications are required.
    mullenhigh.com
  • Lasallian Youth
    Open to all students; direct service to the economically poor, prayer, and community projects such as a Thanksgiving food drive and a Christmas adopt-a-family program.
    mullenhigh.com

Faith formation 1

  • Faith Service CommunityOn campus
    Tuesdays at lunch
    Student group listed on the school's activities page, meeting in room S41.
    mullenhigh.com

Liturgy and prayer 1

  • School music group for Masses and prayer services
    Meets Mondays
    Students and faculty who provide music at school Masses and prayer services.
    mullenhigh.com

Retreats 1

Everything listed is published by the school, its campus ministry, or the parish. Ask the campus minister what’s happening this semester.

Campus ministry

Sources (3)
  1. Faith and Community at Mullen High School | Lasallian Ministriesmullenhigh.com/life-at-mullen/lasallian-ministries · verified Oct. 12, 2026
    “our school liturgical celebrations, including Mass, prayer together, and celebration of the sacraments.”
    School liturgical celebrations, including Mass, are part of the school's faith life; no frequency is stated.
    “The Pastoral Office supports the spiritual life of our community”
    A Pastoral Office supports the spiritual life of the school community.
    “The Pastoral Office supports the spiritual life of our community”
    A Pastoral Office supports the spiritual life of the school community.
  2. Our Campus | Mullen High Schoolmullenhigh.com/about-mullen/our-campus · verified Oct. 12, 2026
    “Rilko Events Center, De La Salle Chapel, Christian Brothers Hall”
    The campus includes De La Salle Chapel.
  3. Contact Mullen High School in Denver | Phone: 303-761-1764mullenhigh.com/about-mullen/contact-and-directory · verified Oct. 12, 2026
    “Mullen High School 3601 South Lowell Blvd. Denver, CO 80236 info@mullenhigh.com”
    The school's campus address and general email are published.

Reach out

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Academic Excellence

AAcademic Excellence: Strong (grade A): 85 to 100 points out of 100 on what official sources document. Grades need sources for at least 60% of the checklist.
86 of 100
From federal data, on fixed published scales.

Each measure counts for the share shown.

  • Graduates going to four-year colleges 75% of scoreThis measure counts for 75% of the Academic Excellence score.98%
  • Students per teacher 25% of scoreThis measure counts for 25% of the Academic Excellence score.13.1 to 1

Bars show points on each measure’s scale. How Academic Excellence is computed. Federal data on private high schools is limited to these two measures.

Source: NCES Private School Survey (2023–24 school year)

School facts

TypeIndependent Catholic school
DioceseArchdiocese of Denver, CO
Grades9–12
Students (all grades)753
Students in grades 9–12753
Coed or single-sexCoed
Student–teacher ratio13.1 to 1
Graduates going to 4-year colleges98%
SettingCity

Source: NCES Private School Survey 23-24 public-use file (school year 2023–24). The college-going rate and student–teacher ratio feed Academic Excellence; nothing here changes the faith grades.

Local Church

Archdiocese of Denver

The Most Reverend James R. Golka, Archbishop of Denver

Formal address: “Your Excellency”

Source: archden.org, verified Oct. 7, 2026.

About this school’s data

Questions families ask

Is Mullen High School a Catholic high school?
Yes. Mullen High School is a Catholic high school in the Archdiocese of Denver.

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