To connect young people to the wonder and science of the natural world, igniting self-discovery and inspiring stewardship of our planet.

501(c)(3) charity; gifts are tax-deductible.
83¢ of each $1 spent went to programs.
Run by 100 volunteers and 276 employees.
Mission: Form 990 Part I, line 1 · Status: IRS Pub. 78 · Programs: Part IX · People: Part I, lines 5–6

Before you give

FY2025 · Form 990Independent: from IRS data, not the org
Download 990
IRS status
501(c)(3)
not on the IRS revocation list
Looks good: listed by the IRS and not on the revocation list.
IRS BMF · Auto-Revocation List
Tax-deductible gifts
Yes
Donations are tax-deductible
Looks good: the IRS lists gifts to it as deductible.
IRS Pub. 78 · IRS BMF
Latest return
FY2025
latest Form 990
Looks good: the latest return is for FY2025, 1 tax year back; within 2 tax years.
IRS e-file · Filing history
Surplus or deficit
4 of 6
filings with a surplus
Average deficit $3.6M a year · 23% of revenue · last 6 filings
Fine: a surplus in 4 of the last 6 filings.
Pt I · Ln 19 · 6 filings
Spent on programs
83%
of spending
Looks good: 83% of spending went to programs; 75% or more.
Pt IX · Ln 25 · col B
Pay to officers and key staff
$1.3M
to officers and key staff · 6% of spending
Looks good: pay to officers and key staff is 6% of spending; 15% or less.
Pt VII · Sec A
5 mo
of spending, in cash
Looks good: 5.0 months of spending in cash; 3 or more.
Pt X · Ln 1–2 · Pt I · Ln 18
Named funders
1
named funder · $25K
Fine: 1 funder names it on their filings; under 3.
Funders’ Sch. I, 990-PF
Liabilities
$4.7M
22% of total assets
Looks good: liabilities are 22% of assets; 50% or less.
Pt X · Ln 26
Independent board members
24
of 24 voting members
Looks good: 24 of 24 voting members are independent, a majority.
Pt VI · Ln 1a–1b
Looks goodFineWorth a lookConcernNo data yetTap a box for the reason.
Revenue
$22.3M
+11% vs prior year
Spent
$21.0M
To programs
83%
Net assets
$16.3M
By yearFY2020–FY2025
Revenue
$22.3M
FY2025▲ +11%
Tap a bar for its year
Revenue by fiscal year
FY2020$15.6M
FY2021$7.8M
FY2022$11.4M
FY2023$15.6M
FY2024$20.2M
FY2025$22.3M
Expenses
$21.0M
FY2025▲ +14%
Tap a bar for its year
Expenses by fiscal year
FY2020$15.2M
FY2021$5.8M
FY2022$36.5M
FY2023$17.6M
FY2024$18.4M
FY2025$21.0M
Net assets
$16.3M
FY2025▲ +10%
Tap a bar for its year
Net assets by fiscal year
FY2020$38.0M
FY2021$40.3M
FY2022$14.7M
FY2023$12.9M
FY2024$14.8M
FY2025$16.3M

From the FY2025 Form 990 (year ending June 2025) · figures checked against the IRS filing · see the original

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Is it real?

Yes. Never revoked by the IRS. Latest filing on record: FY2025. IRS ruling in Jan 1997.

IRS Pub. 78 · IRS Auto-Revocation List · IRS Business Master File

Where the money goes

83 cents of each dollar spent went to programs.

Program services 83% · $17.4M Management & general 12% · $2.5M Fundraising 5% · $1.1M

Form 990 Part IX, line 25, columns B–D. Every line is in By the numbers.

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Who runs it and what they're paid

38 people listed on the 990; $1.3M paid to officers and key staff.

Part VII, Section A · reportable compensation · most recent filed roster (FY2024); the FY2025 filing did not itemize Part VII
President & CEO
$293,469Pt VII · Sec A
$184,245Pt VII · Sec A
$162,783Pt VII · Sec A
Chief Development Officer
$154,451Pt VII · Sec A
Controller
$120,466Pt VII · Sec A
Senior Projects Director
$108,923Pt VII · Sec A
Campus Director
$105,670Pt VII · Sec A
HR Director
$103,505Pt VII · Sec A

Phillip Kilbridge’s $293K as President & CEO is at the 62nd percentile of top reported officer pay among 324 $10–100M environment nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.

Compensation history total reportable pay by year · 8 named individuals · Part VII

NameFY2025FY2024FY2023FY2022FY2021FY2020
Phillip Kilbridge$293,469$212,879$198,977$183,886$190,729$263,630
Judy Lin$184,245$176,937$168,774$165,822$144,727$162,856
Leslie Smith$162,783$124,626————
Aaron Craig Rich$154,451$150,970$145,004$140,235$123,736$135,199
Mitchell Holmer——$133,108$121,936$115,224$118,611
Stephen Streufert————$128,276—
Julie Krebs$120,466$113,592$105,803——$101,492
Fred Brill—————$111,578

Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.

See Naturebridge executive salaries →

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Questions the 990 asks

The form asks each of these directly. These are the filed answers.

  • Family or business ties among officersPt VI · Ln 2No
  • Top official's pay set by an independent reviewPt VI · Ln 15aYes

Programs and updates

Provides hands-on outdoor education programs for youth in national parks to foster scientific understanding, self-discovery, and environmental stewardship.

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Provided by the organization

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1 program · $17.4M · in their own filed words · FY2024
01

Naturebridge connects young people to the wonder and science of the natural world, igniting self-discovery and inspiring stewardship of our planet. We deliver hands-on outdoor education programs in some of the world's most beautiful classrooms-our national parks.

$17.4Mprogram expense

Funders

Who pays for it.

From grant filings on record. Receipts are incomplete: individual donors are never listed.

Grants

Schedule I · received and paid
Grants received · FY2025
Total grants receivedfrom 1 funder$25K
Grants paid · 294 grants · $3.0M · 2019–2024
The Woods Project INCTX · FY2024$44,367
Graham Middle School (mvwsd)FY2024$24,990
John Barrett Middle SchoolFY2024$23,955
Ingenuity PrepFY2024$19,480
Brightwood Education CampusFY2024$16,970
Mlk ElementaryFY2024$14,548
Calistoga Elementary SchoolFY2024$14,477
Caroline Wenzel Elementary School (scusd)FY2024$14,400
Schurr High SchoolFY2024$14,377
Wsu Gear Up - Early Outreach ProgramWA · FY2024$12,903
Mariposa and El Portal Elementary Schools (mcusd)FY2024$12,690
Mission Preparatory INCCA · FY2024$12,671
Miner Elementary SchoolFY2024$11,630
See all 294 grants →

By the numbers

The FY2025 990, line by line.

1The main four
Money inPt VIII
$22.3M
Ln 12
Fees for servicesLn 2g$17.8M
Gifts and grantsLn 1h$4.3M
Investment incomeLn 3$553K
Money outPt IX
$21.0M
Ln 25
Programscol B$17.4M
Managementcol C$2.5M
Fundraisingcol D$1.1M
Owns and owesPt X
$16.3M
net assets · Ln 32
Cash and savingsLn 1–2$8.8M
Total assetsLn 16$21.0M
LiabilitiesLn 26$4.7M
PeoplePt VI, VII
38
listed · VII A
PaidVII A9
Voting boardVI 1a24
IndependentVI 1b24
2In more detail
Revenue in detailPt VIII
Gifts and grantsLn 1h$4.3M
Government grantsLn 1e$25K
Noncash giftsLn 1g$165K
Fundraising eventsLn 1c$1.6M
Fees for servicesLn 2g$17.8M
Investment incomeLn 3$553K
Gains on assetsLn 7$105K
Total revenueLn 12$22.3M
Assets in detailPt X, end of year
CashLn 1$47K
SavingsLn 2$8.7M
Cash and savings togetherLn 1–2$8.8M
InvestmentsLn 11–13$2.7M
Land, buildings, equipmentLn 10c$6.1M
Other assetsLn 15$9K
Total assetsLn 16$21.0M
LiabilitiesLn 26$4.7M
Net assetsLn 32$16.3M
OperationsPt I, VI
EmployeesI 5276
VolunteersI 6100
Fiscal year endsHeaderJune
Conflict-of-interest policyVI 12aYes
Whistleblower policyVI 13Yes
Records policyVI 14Yes
3Year over year
Balance sheet, start vs end of yearPt X · col A, B
LineStart FY25End FY25
Cash and savingsLn 1–2$10.8M$8.8M
InvestmentsLn 11–13$2.6M$2.7M
Land, buildings, equipmentLn 10c$4.8M$6.1M
Total assetsLn 16$19.5M$21.0M
LiabilitiesLn 26$4.7M$4.7M
Net assetsLn 32$14.8M$16.3M
4Every line
Statement of functional expensesPt IX · every line
LineTotalProgramsManagementFundraising
Grants to domestic organizationsLn 1$1.2M$1.2M
Pay of current officers, directors and key staffLn 5$1.0M$296K$320K$384K
Other salaries and wagesLn 7$8.9M$7.5M$1.0M$429K
Pension plan contributionsLn 8$139K$109K$19K$11K
Other employee benefitsLn 9$1.4M$1.1M$172K$101K
Payroll taxesLn 10$810K$633K$111K$66K
Legal feesLn 11b$13K$13K
Accounting feesLn 11c$58K$58K
Other fees for servicesLn 11g$401K$173K$218K$10K
Advertising and promotionLn 12$76K$9K$65K$725
Office expensesLn 13$1.4M$1.2M$126K$55K
Information technologyLn 14$233K$7K$186K$40K
OccupancyLn 16$1.5M$1.5M$2K$3K
TravelLn 17$101K$55K$36K$9K
Conferences, conventions and meetingsLn 19$16K$14K$2K
Depreciation, depletion and amortizationLn 22$501K$485K$10K$6K
InsuranceLn 23$637K$568K$42K$27K
Other expenses (24a–d)Ln 24$2.4M$2.4M$41K$2K
All other expensesLn 24e$150K$124K$25K$201
Total functional expensesLn 25$21.0M$17.4M$2.5M$1.1M

Filing history

YearMoney inMoney outIn minus outNet assetsDownload
FY2025 Latest Viewing $22.3M$21.0M$1.4M$16.3M 990 PDF
FY2024 $20.2M$18.4M$1.8M$14.8M 990 PDF
FY2023 $15.6M$17.6M−$2.0M$12.9M 990 PDF
FY2022 $11.4M$36.5M−$25.1M$14.7M 990 PDF
FY2021 $7.8M$5.8M$2.0M$40.3M 990 PDF
FY2020 $15.6M$15.2M$486K$38.0M 990 PDF

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Schedules filed Part IV

III · Programs R · Related orgs G · Fundraising L · Interested persons I · Grants A · Public support M · Noncash J · Pay O · Explanations
See the full FY2025 990 (6 parts)
Part I · Summary $22,346,456 revenue, 12 lines filed
I-8 Contributions and grantsPrior year $4,390,160$4,266,346
I-9 Program service revenuePrior year $15,944,595$17,765,452
I-10 Investment incomePrior year $381,281$553,298
I-11 Other revenuePrior year −$521,837−$238,640
I-12 Total revenuePrior year $20,194,199$22,346,456
I-13 Grants and similar amounts paidPrior year $959,410$1,181,680
I-14 Benefits paid to membersPrior year $0$0
I-15 Salaries and benefitsPrior year $10,922,838$12,306,721
I-16a Professional fundraising feesPrior year $0$0
I-17 Other expensesPrior year $6,554,549$7,481,139
I-18 Total expensesPrior year $18,436,797$20,969,540
I-19 Revenue less expensesPrior year $1,757,402$1,376,916
Part VI · Governance 24 of 24 board members independent, no flags
VI-1a Voting members of the governing body24
VI-1b Independent voting members24
VI-2 Family or business relationship among officers or directorsNo
VI-12a Written conflict of interest policyYes
VI-13 Written whistleblower policyYes
VI-14 Document retention and destruction policyYes
VI-15a Process for setting top official's payYes
Part VIII · Statement of revenue $22,346,456 across 12 lines filed
Lines not itemized here account for $9,594 of total revenue; see the IRS return.
VIII-1c Fundraising events$1,622,555
VIII-1e Government grants$25,000
VIII-1f All other contributions, gifts and grants$2,618,791
VIII-1g Noncash contributions (included above)$165,439
VIII-1h Total contributions, gifts and grants$4,266,346
VIII-2a-f Program service revenue, itemized rows (sum of 2a–2f as filed)Related to mission $17,046,629 · Unrelated business $711,523$17,758,152
VIII-3 Investment incomeExcluded from tax $447,870$447,870
VIII-6 Net rental income or lossExcluded from tax $19,358$19,358
VIII-7 Net gain or loss on sales of assetsExcluded from tax $105,428$105,428
VIII-8 Net income from fundraising eventsExcluded from tax −$473,018−$473,018
VIII-11a-d Other revenue, itemized rows (sum of 11a–11d as filed)Related to mission $212,726$212,726
VIII-12 Total revenueRelated to mission $17,266,655 · Unrelated business $711,523 · Excluded from tax $101,932$22,346,456
Part IX · Statement of functional expenses $20,969,540 across 19 lines filed
IX-1 Grants to domestic organizationsPrograms $1,181,680$1,181,680
IX-5 Pay of current officers, directors and key staffPrograms $295,852 · Management $320,361 · Fundraising $384,017$1,000,230
IX-7 Other salaries and wagesPrograms $7,503,610 · Management $1,009,060 · Fundraising $428,836$8,941,506
IX-8 Pension plan contributionsPrograms $108,897 · Management $19,179 · Fundraising $11,335$139,411
IX-9 Other employee benefitsPrograms $1,142,211 · Management $171,602 · Fundraising $101,420$1,415,233
IX-10 Payroll taxesPrograms $632,977 · Management $111,478 · Fundraising $65,886$810,341
IX-11b Legal feesManagement $13,329$13,329
IX-11c Accounting feesManagement $58,090$58,090
IX-11g Other fees for servicesPrograms $173,035 · Management $218,383 · Fundraising $9,739$401,157
IX-12 Advertising and promotionPrograms $9,492 · Management $65,305 · Fundraising $725$75,522
IX-13 Office expensesPrograms $1,186,288 · Management $126,331 · Fundraising $55,405$1,368,024
IX-14 Information technologyPrograms $6,787 · Management $186,287 · Fundraising $40,409$233,483
IX-16 OccupancyPrograms $1,494,556 · Management $2,200 · Fundraising $2,841$1,499,597
IX-17 TravelPrograms $55,203 · Management $36,417 · Fundraising $9,368$100,988
IX-19 Conferences, conventions and meetingsPrograms $13,994 · Management $2,411$16,405
IX-22 Depreciation, depletion and amortizationPrograms $484,965 · Management $9,872 · Fundraising $6,174$501,011
IX-23 InsurancePrograms $568,438 · Management $42,434 · Fundraising $26,539$637,411
IX-24 Other expenses (24a–d)Programs $2,383,761 · Management $41,024 · Fundraising $1,733$2,426,518
IX-24e All other expensesPrograms $124,086 · Management $25,317 · Fundraising $201$149,604
IX-25 Total functional expensesPrograms $17,365,832 · Management $2,459,080 · Fundraising $1,144,628$20,969,540
Part X · Balance sheet $20,990,532 assets, 19 lines filed
X-1 Cash, non-interest-bearingStart of year $2,046,203$47,034
X-2 Savings and temporary cash investmentsStart of year $8,725,480$8,739,015
X-3 Pledges and grants receivableStart of year $602,757$675,576
X-4 Accounts receivableStart of year $447,132$430,444
X-8 Inventories for sale or useStart of year $57,789$44,135
X-9 Prepaid expenses and deferred chargesStart of year $230,562$747,253
X-10c Land, buildings and equipment, netStart of year $4,827,626$6,140,570
X-11 Publicly traded securitiesStart of year $2,550,228$2,657,729
X-14 Intangible assetsStart of year $0$1,500,000
X-15 Other assetsStart of year $9,978$8,776
X-16 Total assetsStart of year $19,497,755$20,990,532
X-17 Accounts payable and accrued expensesStart of year $1,723,068$1,828,267
X-19 Deferred revenueStart of year $2,957,688$2,827,111
X-25 Other liabilitiesStart of year $30,000$37,875
X-26 Total liabilitiesStart of year $4,710,756$4,693,253
X-27 Net assets without donor restrictionsStart of year $6,086,011$9,472,892
X-28 Net assets with donor restrictionsStart of year $8,700,988$6,824,387
X-32 Total net assets or fund balancesStart of year $14,786,999$16,297,279
X-33 Total liabilities and net assetsStart of year $19,497,755$20,990,532
Part XI · Reconciliation of net assets $16,297,279 net assets at year end
XI-1 Total revenue$22,346,456
XI-2 Total expenses$20,969,540
XI-3 Revenue less expenses$1,376,916
XI-4 Net assets at start of year$14,786,999
XI-5 Net unrealized gains (losses) on investments$131,953
XI-6 Donated services and use of facilities$1,411
XI-9 Other changes in net assets$0
XI-10 Net assets at end of year$16,297,279

Form 990 e-file (XML) FY2025 from the IRS · Classification, formation year and address from the IRS Business Master File

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