- 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 LewisADAM LEWIS
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Adelaide WatersADELAIDE WATERS
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Alex SanchezALEX SANCHEZ
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Andy DockenANDY DOCKEN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Barbara RosenbergBARBARA ROSENBERG
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Ben PritzkerBEN PRITZKER
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Brian BradyBRIAN BRADY
TREASURER
- Total calculated
- $0
- Hours/week
- 2
-
Chris DanielsCHRIS DANIELS
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Diane MooreDIANE MOORE
CHAIR
- Total calculated
- $0
- Hours/week
- 4
-
Gina MurdockGINA MURDOCK
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Hadley HentschelHADLEY HENTSCHEL
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Jennifer GoldfarbJENNIFER GOLDFARB
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Jerry MurdockJERRY MURDOCK
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Jody GuralnickJODY GURALNICK
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Leslie LamontLESLIE LAMONT
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Mark HamiltonMARK HAMILTON
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Megan TalaricoMEGAN TALARICO
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Reenie KinneyREENIE KINNEY
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Tomakin ArchambaultTOMAKIN ARCHAMBAULT
TRUSTEE
- Total calculated
- $0
- Hours/week
- 1
-
Chris LaneCHRIS 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 MahonCHRISTINA MAHON
EMPLOYEE
- Total calculated
- $128,926
- From this org
- $128,926
- From related orgs
- $0
- Other
- $0
- Hours/week
- 40
-
Clayton B KettelkampCLAYTON 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
-
2023 For grant recipient's exempt purposes
-
2023 TO SUPPORT ANNUAL OPERATIONS
-
2024 TO SUPPORT ANNUAL OPERATIONS
-
2024 For grant recipient's exempt purposes
-
2022 For grant recipient's exempt purposes
-
$141,700
2022 THE PURPOSE OF THIS GRANT IS GENERAL SUPPORT.
-
DONOR ADVISED CHARITABLE GIVING
$102,750
2024 ENVIRONMENTAL AND ANIMALS
-
2024 UNRESTRICTED GENERAL SUPPORT
-
$64,950
2024 ENVIRONMENT, ANIMALS
-
$55,000
2024 TO SUPPORT THE EVENING ON THE LAKE
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
-
ASPEN CENTER FOR ENVIRONMENTAL STUDIES ENDOWMENT FUND
501(C)(3) · SUPPORTING ORGANIZATION · CO
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.