Amendment 1: Request for Proposals to Provide Guided Interpretive Whitewater River Trips within Dinosaur National Monument CC-DINOXXX-26

Amendment 1 amends the prospectus and provides responses to questions received. Deadlines and contact information are changed as follows: Questions Due If you do not understand something in this Prospectus, you must submit your questions or comments to Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on June 30, 2025. The questions must be in a format that allows the NPS to copy them to Microsoft Word. Notice of Intent to Propose If you plan to submit a proposal in response to this solicitation, you must notify Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on July 28, 2025. The NPS will not accept proposals from entities that do not provide notice on or before that date. Submission of an Electronic Proposal In order to be evaluated and considered for award of a Concession Contract, the Electronic Proposal must be received by the Commercial Services Program Lead, Interior Regions 6, 7, & 8, National Park Service by 4:00 p.m. Mountain Time on August 12, 2025. After the Notice of Intent to Propose deadline and prior to the electronic proposal submission deadline, you will receive a welcome email message from the NPS s Microsoft Teams platform at the email address you provided when you notified the Service of your intent to submit a proposal. You must accept the invitation before you can access the Teams site to upload your proposal. The NPS will not accept proposals submitted in hardcopy or via another electronic platform, including email. See Prospectus Part II Proposal Instructions for details on submitting an Electronic Proposal. Contact List To be put on a contact list to receive amendments or any additional information specific to the Prospectus, interested parties must provide their contact information (name, email address, and phone number) to Jennifer Parker via email at imr_concessions@nps.gov. The contact list already includes the Existing Concessioners. _____________________________ The National Park Service (NPS) provides notice of the release of a Prospectus (No. CC-DINOXXX-26) to solicit proposals for the award of up to 11 Concession Contracts to provide guided interpretive whitewater river trips within Dinosaur National Monument. The effective date of the next Concession Contracts is expected to be January 1, 2026. The Prospectus explains the business opportunity and the terms and conditions under which the NPS will award the Concession Contracts. The Prospectus will be available at https://www.nps.gov/subjects/concessions/prospectuses.htm. Previous dates are changed in Amendment 1 and information is listed above.

Amendment 2 amends the prospectus and provides responses to additional questions received. All deadlines remain as stated in Amendment 1. ____________________________________________________ Amendment 1 amends the prospectus and provides responses to questions received. Deadlines and contact information are changed as follows: Questions Due If you do not understand something in this Prospectus, you must submit your questions or comments to Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on June 30, 2025. The questions must be in a format that allows the NPS to copy them to Microsoft Word. Notice of Intent to Propose If you plan to submit a proposal in response to this solicitation, you must notify Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on July 28, 2025. The NPS will not accept proposals from entities that do not provide notice on or before that date. Submission of an Electronic Proposal In order to be evaluated and considered for award of a Concession Contract, the Electronic Proposal must be received by the Commercial Services Program Lead, Interior Regions 6, 7, & 8, National Park Service by 4:00 p.m. Mountain Time on August 12, 2025. After the Notice of Intent to Propose deadline and prior to the electronic proposal submission deadline, you will receive a welcome email message from the NPS s Microsoft Teams platform at the email address you provided when you notified the Service of your intent to submit a proposal. You must accept the invitation before you can access the Teams site to upload your proposal. The NPS will not accept proposals submitted in hardcopy or via another electronic platform, including email. See Prospectus Part II Proposal Instructions for details on submitting an Electronic Proposal. Contact List To be put on a contact list to receive amendments or any additional information specific to the Prospectus, interested parties must provide their contact information (name, email address, and phone number) to Jennifer Parker via email at imr_concessions@nps.gov. The contact list already includes the Existing Concessioners. _____________________________ The National Park Service (NPS) provides notice of the release of a Prospectus (No. CC-DINOXXX-26) to solicit proposals for the award of up to 11 Concession Contracts to provide guided interpretive whitewater river trips within Dinosaur National Monument. The effective date of the next Concession Contracts is expected to be January 1, 2026. The Prospectus explains the business opportunity and the terms and conditions under which the NPS will award the Concession Contracts. The Prospectus will be available at https://www.nps.gov/subjects/concessions/prospectuses.htm. Previous dates are changed in Amendment 1 and information is listed above.

Amendment 3 amends the prospectus and provides responses to questions received during the original question and answer period of the solicitation that were inadvertently not included in Amendment 1. Deadlines are changed as follows: Submission of an Electronic Proposal In order to be evaluated and considered for award of a Concession Contract, the Electronic Proposal must be received by the Commercial Services Program Lead, Interior Regions 6, 7, & 8, National Park Service by 4:00 p.m. Mountain Time on August 19, 2025. After the Notice of Intent to Propose deadline and prior to the electronic proposal submission deadline, you will receive a welcome email message from the NPS s Microsoft Teams platform at the email address you provided when you notified the Service of your intent to submit a proposal. You must accept the invitation before you can access the Teams site to upload your proposal. The NPS will not accept proposals submitted in hardcopy or via another electronic platform, including email. See Prospectus Part II Proposal Instructions for details on submitting an Electronic Proposal. ___________________________________________________ Amendment 2 amends the prospectus and provides responses to additional questions received. All deadlines remain as stated in Amendment 1. ____________________________________________________ Amendment 1 amends the prospectus and provides responses to questions received. Deadlines and contact information are changed as follows: Questions Due If you do not understand something in this Prospectus, you must submit your questions or comments to Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on June 30, 2025. The questions must be in a format that allows the NPS to copy them to Microsoft Word. Notice of Intent to Propose If you plan to submit a proposal in response to this solicitation, you must notify Jennifer Parker, Commercial Services Program Lead, via email at imr_concessions@nps.gov no later than 4:00 p.m. Mountain Time on July 28, 2025. The NPS will not accept proposals from entities that do not provide notice on or before that date. Submission of an Electronic Proposal In order to be evaluated and considered for award of a Concession Contract, the Electronic Proposal must be received by the Commercial Services Program Lead, Interior Regions 6, 7, & 8, National Park Service by 4:00 p.m. Mountain Time on August 12, 2025. After the Notice of Intent to Propose deadline and prior to the electronic proposal submission deadline, you will receive a welcome email message from the NPS s Microsoft Teams platform at the email address you provided when you notified the Service of your intent to submit a proposal. You must accept the invitation before you can access the Teams site to upload your proposal. The NPS will not accept proposals submitted in hardcopy or via another electronic platform, including email. See Prospectus Part II Proposal Instructions for details on submitting an Electronic Proposal. Contact List To be put on a contact list to receive amendments or any additional information specific to the Prospectus, interested parties must provide their contact information (name, email address, and phone number) to Jennifer Parker via email at imr_concessions@nps.gov. The contact list already includes the Existing Concessioners. _____________________________ The National Park Service (NPS) provides notice of the release of a Prospectus (No. CC-DINOXXX-26) to solicit proposals for the award of up to 11 Concession Contracts to provide guided interpretive whitewater river trips within Dinosaur National Monument. The effective date of the next Concession Contracts is expected to be January 1, 2026. The Prospectus explains the business opportunity and the terms and conditions under which the NPS will award the Concession Contracts. The Prospectus will be available at https://www.nps.gov/subjects/concessions/prospectuses.htm. Previous dates are changed in Amendment 1 and information is listed above.