As long as you're not landing anywhere else, you can discuss it with your instructor. 14 CFR 61.93 states:
§ 61.93 Solo cross-country flight requirements.
(a) General.
(1) Except as provided in paragraph (b) of this section, a student pilot must meet the requirements of this section before -
(i) Conducting a solo cross-country flight, or any flight greater than 25 nautical miles from the airport from where the flight originated.
(ii) Making a solo flight and landing at any location other than the airport of origination.
That doesn't mean you can't fly farther than 25 nm from the airport, but you can't do it until you've met the cross country requirements of 61.93(a). You can receive an endorsement to land at other airports within a 25 nm radius of the airport, in accordance with 61.93(b)(1), and you can be endorsed for cross country flights up to 50 nm on a repeat basis in accordance with 61.93(b)(2).
Have a chat with your instructor. He or she will fill you in on what you can and can't do. Remember that regardless of the regulation, you're also bound by the limitations that your instructor places in your logbook. The instructor is carrying a lot of responsibility every time you go fly, so many instructors will put various limitations on their students, initially. When you first start, it's not a bad idea to stay fairly close to the nest.