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US nonprofit · EIN 274545786 · Durango, COiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 274545786) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 30 June 2025: assets, liabilities, staff, website, telephone, pay, grants paid (Schedule I).Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.State registers Colorado Secretary of State (17 October 2026).Licence US Federal Government public domain.How we handle data

Mountain Middle School

Donations deductible
Revenue
$5.5m
year to 30 June 2025
Expenses
$5.2m
year to 30 June 2025
Total assets
$5.5m
$4.5m liabilities
Net assets
$1m
assets less liabilities
Directors and trustees
4
3.2y av
Staff
38
45 volunteers
Left since last filing
0
no seats appear to have opened
Voting members
4
reported in Part VI
How am I connected?

Mountain Middle School's network

4 people1 organisationi4 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Violet dotted lines (1) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

4 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 4 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Erin BirtMember2023
3 yrs
John ArmsTreasurer2024
2 yrs
Justin ThornbladhMember2023
3 yrs
Lorien ChambersPresident2023
3 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 30 June 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Lorien Chambers SchuldtPresident4$0
Justin ThornbladhVice Pres/Se1.5$0
John ArmsTreasurer4$0
Erin BirtMember1.5$0
Dj JergensenMember1.5$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Mountain Middle School
EIN
274545786
Address
108 W 31st St, Durango, CO, 81301-4231
State
Colorado
Mission
Mountain middle school (mms or the school), a colorado non-profit corporation, was created in 2009 pursuant to the colorado charter schools act to form and operate a charter school located in durango, colorado. Mms inspires students to own their learning journey through a supportive community and transformative learning experiences. This empowers them to thrive academically and socially... (as filed on the Form 990)
Activity (NTEE)
B24 Education
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Education
Size band
7 (IRS master file code)
Formed
2009
Principal officer
Lorien Chambers Schuldt (as named on the Form 990)
IRS ruling date
1 July 2011
Status
Code 01 (unconditional exemption)
Form 990 filings on record
6, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥3years on the filingsErin Birt
≥3years on the filingsJustin Thornbladh
≥3years on the filingsLorien Chambers
≥2years on the filingsJohn Arms

Latest return

year to 30 June 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 June 2025. US dollars, as filed.
Total assets
$5.5m
Total liabilities
$4.5m
Net assets or fund balances
$1m
Contributions and grants received
$350k
Program service revenue
$159k
Grants and similar paid out
$388k
Employees
38
Volunteers
45

Grants paid

1 listediFrom Schedule I of the Form 990: grants and assistance to organisations in the United States, largest first (up to 25). Schedule I is filed only by organisations that gave more than $5,000 to any one recipient.
RecipientPurposeAmount
Mountain Foundation for EducationBldg improv & purch$388k