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Youth and community nonprofits / Colorado / Lone Tree

Amateur sports

Nauvoo Marathon

A tax-exempt amateur sports nonprofit with a mailing address in Lone Tree, Colorado, IRS-recognized as tax-exempt since 2025.

Data as of November 8, 2026Markdown copyJSON data

IRS facts

Type: Amateur sports (IRS activity code N60)

Mailing city (IRS): Lone Tree, Colorado 80124

EIN: 33-4555413

Tax status: 501(c)(3), eligible to receive tax-deductible donations; IRS-recognized as tax-exempt since 2025, per IRS records posted October 13, 2026.

Revenue on its latest IRS filing: Not reported. Groups with under $50,000 in receipts usually file the e-Postcard (Form 990-N), which shows no revenue.

Check its status on IRS Tax Exempt Organization Search · Filings on ProPublica Nonprofit Explorer

Around Lone Tree and its county

Douglas County, Colorado: the Census Bureau estimates about 87,829 children under 18 (July 1, 2024). This directory lists 178 youth and community nonprofits with a mailing ZIP code in the county, about 2.0 per 1,000 children. The count includes PTAs, arts and day care groups, so it is not a measure of places for kids.

This group's ZIP code is matched to the county that holds most of its area, so counts are approximate. County figures come from the Census Bureau's Vintage 2024 population estimates.

Licensed programs in Lone Tree

11 licensed child care centers, 4 school-age programs are in state licensing records and listed in the BackPR finder. The examples below are not related to this organization.

licensed child care center

Child Discovery Time @ Lone Tree

Lone Tree, CO

State record

licensed child care center

DOUGLAS CTY SCHL LONE TREE PRSCHL

Lone Tree, CO

State record

licensed child care center

EAGLE RIDGE ELEMENTARY PRESCHOOL

Lone Tree, CO

State record

licensed child care center

Garden Preschool of Lone Tree

Lone Tree, CO

State record

Colorado background check rules for youth programs · How BackPR works for amateur sports nonprofits

Questions about Nauvoo Marathon

What is Nauvoo Marathon's EIN?

Nauvoo Marathon's EIN (Employer Identification Number) is 33-4555413. It is the nine-digit number the IRS uses to identify the organization. Source: IRS Exempt Organizations Business Master File posted October 13, 2026.

Is Nauvoo Marathon a nonprofit?

Yes. The IRS lists Nauvoo Marathon in Lone Tree, Colorado as tax-exempt under section 501(c)(3), recognized since 2025. This is from the IRS Business Master File posted October 13, 2026. Status can change, so check its current status on the IRS Tax Exempt Organization Search before you donate.

Are donations to Nauvoo Marathon tax-deductible?

Yes, the IRS lists gifts to Nauvoo Marathon as tax-deductible (IRS Business Master File posted October 13, 2026). How much you can deduct depends on your own taxes, and this is not tax advice. Check its current status on the IRS Tax Exempt Organization Search before you donate.

What does Nauvoo Marathon do?

The IRS classifies Nauvoo Marathon as: Amateur sports. It has not filed a Form 990 or 990-EZ with a mission statement that we have loaded.

Do you run this organization?

You can add your programs, season dates, ages, prices, registration link and logo to this page, or ask us to remove it. BackPR's free plan for 501(c)(3)s handles online registration, payments, waivers and attendance. No subscription and no BackPR fee on what families pay (card processing fees from Stripe still apply).

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Free forms for amateur sports nonprofits

Registration formFreeMedical and allergy formFreeCode of conductFreePhoto releaseFree

More amateur sports nonprofits in Lone Tree

All youth and community nonprofits in Lone Tree

Source: IRS Exempt Organizations Business Master File, posted October 13, 2026. We list 501(c)(3) organizations whose IRS activity code is youth development, amateur sports, camps and recreation, parent-teacher groups, children's services, child day care or arts education. We show the city and ZIP code only, never a street address or contact person. A listing is not an endorsement.

Data as of November 8, 2026. Sources: IRS Business Master File (posted October 13, 2026), U.S. Census Bureau population estimates (July 1, 2024), state child care licensing records in the BackPR finder. Growth labels, ranks and percentiles are BackPR's own calculations.

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