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ASPEN CENTER FOR ENVIRONMENTAL STUDIES

EIN 23-7042291 ASPEN, CO

Revenue 2024
$6,250,553
Expenses 2024
$5,018,774

Program services were 73.5% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
C600
Classification
1200
Street
100 PUPPY SMITH ST

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

ACES' MISSION IS TO INSPIRE A LIFE-LONG COMMITMENT TO THE EARTH BY PROVIDING INNOVATIVE AND IMMERSIVE PROGRAMMING FOR ALL AGES.

Activities or mission (Part I)

EDUCATING FOR ENVIRONMENTAL RESPONSIBILITY

  • ASPEN CENTER FOR ENVIRONMENTAL STUDIES (ACES) IS A NONPROFIT ENVIRONMENTAL SCIENCE EDUCATION ORGANIZATION.ACES INSPIRES A LIFE-LONG COMMITMENT TO THE EARTH BY PROVIDING INNOVATIVE AND IMMERSIVE EDUCATIONAL PROGRAMMING FOR ALL AGES. WE HAVE THREE LOCATIONS: HALLAM LAKE, ROCK BOTTOM RANCH, AND CATTO CENTER AT TOKLAT. OUR EDUCATION PROGRAMS FOCUS ON ECOLOGICAL LITERACY, REGENERATIVE AGRICULTURE, FOREST AND ECOSYSTEM HEALTH, LAND RESTORATION, AND ENVIRONMENTAL CIVIC LEADERSHIP AND THEY REACH OVER 140,000 INDIVIDUALS EVERY YEAR. IN PARTNERSHIP WITH 60 PLUS PARTNER ORGANIZATIONS, ACES TEACHES ENVIRONMENTAL SCIENCE DAILY IN SCHOOLS FROM ASPEN TO RIFLE COLORADO, PROVIDES DAY CAMPS FOR CHILDREN IN THE SUMMER AND OVER SELECT HOLIDAYS, GUIDES ADULTS AND YOUTHS OF ALL AGES ON OUTDOOR NATURE CLASSES, GUIDED HIKES AND FIELD PROGRAMS. WE ALSO ENGAGE OUR COMMUNITY BY HOSTING PUBLIC LECTURES AND EVENTS ABOUT CUTTING EDGE ENVIRONMENTAL SCIENCE. THROUGH COLLABORATIONS WITH LAND TRUSTS, PUBLIC AGENCIES AND OTHER NONPROFIT ORGANIZATIONS; ACES CARRIES OUT ITS MISSION "EDUCATING FOR ENVIRONMENTAL RESPONSIBILITY."

    Expenses $3,687,710 · Revenue $1,214,323

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Adam Lewis

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Adelaide Waters

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Alex Sanchez

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Andy Docken

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Barbara Rosenberg

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Ben Pritzker

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Brian Brady

    TREASURER

    Total calculated
    $0
    Hours/week
    2
  • Chris Daniels

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Diane Moore

    CHAIR

    Total calculated
    $0
    Hours/week
    4
  • Gina Murdock

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Hadley Hentschel

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Jennifer Goldfarb

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Jerry Murdock

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Jody Guralnick

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Leslie Lamont

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Mark Hamilton

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Megan Talarico

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Reenie Kinney

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Tomakin Archambault

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1
  • Chris Lane

    CEO

    Total calculated
    $286,971
    From this org
    $286,971
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $286,971
    Bonus
    $0
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $0
    Filer's total
    $286,971
  • Christina Mahon

    EMPLOYEE

    Total calculated
    $128,926
    From this org
    $128,926
    From related orgs
    $0
    Other
    $0
    Hours/week
    40
  • Clayton B Kettelkamp

    EMPLOYEE

    Total calculated
    $125,026
    From this org
    $125,026
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $6,250,553
    Expenses
    $5,018,774
    Contributions
    $4,848,390
    Grants paid
    $0
  • 2022
    Revenue
    $5,628,622
    Expenses
    $3,964,246
    Contributions
    $4,120,766
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $4,526,369
    Expenses
    $3,211,488
    Assets (EOY)
    $34,082,022
  • 2020 · 990

    Revenue
    $6,676,243
    Expenses
    $2,880,705
    Assets (EOY)
    $32,605,715
  • 2019 · 990

    Revenue
    $10,605,639
    Expenses
    $2,548,123
    Assets (EOY)
    $28,539,165
  • 2018 · 990

    Revenue
    $9,045,765
    Expenses
    $2,958,565
    Assets (EOY)
    $20,495,195
  • 2017 · 990

    Revenue
    $3,542,366
    Expenses
    $2,598,618
    Assets (EOY)
    $14,318,186
  • 2016 · 990

    Revenue
    $2,673,993
    Expenses
    $2,368,811
    Assets (EOY)
    $13,384,706
  • 2015 · 990

    Revenue
    $4,451,911
    Expenses
    $2,373,840
    Assets (EOY)
    $13,245,287
  • 2014 · 990

    Revenue
    $2,865,822
    Expenses
    $2,501,491
    Assets (EOY)
    $10,796,640
  • 2013 · 990

    Revenue
    $3,036,260
    Expenses
    $2,261,466
    Assets (EOY)
    $10,247,209
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $2,118,506
    Assets (EOY)
    $9,394,713

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2024 return

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 29 October 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.