Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,311 recruiting cancer studies with a site in California — including Early Phase 1, Phase 1, Phase 1/Phase 2, Phase 2, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06134232RecruitingPhase 2
Extra sipuleucel-T after Provenge for prostate cancer
This trial tests whether adding one extra infusion of sipuleucel-T (the same drug as Provenge) after the standard three doses can help men with advanced prostate cancer that no longer responds to hormone therapy. It is for men who have already finished their three Provenge infusions and have mild or no symptoms.
Duarte, CaliforniaAges 18 years+ - NCT04712877Recruiting
Blood and tumor testing to choose the right lung cancer treatment
This trial tests tumor tissue and a blood sample to help doctors pick the most personalized treatment for people with suspected lung cancer. It may help ensure you get therapy matched to your specific tumor characteristics, especially when the cancer might be surgically removed.
Los Angeles, CaliforniaAges Any age - NCT04986423RecruitingPhase 2
Add ZEN003694 to enzalutamide for resistant prostate cancer
This Phase 2 study tests whether adding ZEN003694 to enzalutamide works better than enzalutamide alone in men whose prostate cancer has spread and is no longer controlled by hormone lowering treatments. It focuses on people who either did not respond well to abiraterone (poor responders) or did respond (responders), then compares outcomes between treatment groups.
Los Angeles, CaliforniaAges 18 years+ - NCT05019716RecruitingPhase 1/Phase 2
Adding ZEN003694 to chemo for NUT cancer
This early-phase study tests whether adding ZEN003694 to standard chemotherapy (cisplatin/etoposide or carboplatin/paclitaxel) is safe and can help control NUT carcinoma. It enrolls people ages 12–17 and adults, including some patients whose cancer has spread or can’t be safely removed.
Los Angeles, CaliforniaAges 12 years+ - NCT03547973RecruitingPhase 2
Study of sacituzumab govitecan for advanced or non-removable bladder cancer
This trial tests sacituzumab govitecan, an anti-cancer drug, for people with urothelial (bladder/urinary tract) cancer that has spread or can’t be removed with surgery. It’s designed for tumors that have been treated already in specific ways, to see if the medicine can shrink or control the cancer.
Los Angeles, CaliforniaAges 18 years+ - NCT04524871RecruitingPhase 1/Phase 2
Immunotherapy combinations for advanced liver cancer
This Phase 1/2 study tests new combinations of immune system medicines in people with advanced liver cancer that cannot be cured by surgery. It looks for safer treatment and signs that the medicines can shrink or control the cancer.
Costa Mesa, CaliforniaAges 18 years+ - NCT03869814Recruiting
Blood test to study cancer signals without invasive procedures
This study looks at a non-invasive blood test to detect cancer-related “signal patterns” and see how well they match different types of cancer. It may help researchers learn better ways to find or understand cancer using less invasive testing.
San Diego, CaliforniaAges 21–80 - NCT04402788RecruitingPhase 2/Phase 3
Radiation added to immune therapy for extensive small cell lung cancer
This trial tests whether adding radiation therapy to standard immune therapy (atezolizumab) after initial chemo can help people with extensive-stage small cell lung cancer live longer and control the cancer better. You must have a good response (partial response) or stable disease after initial treatment, plus several lab/imaging checks to confirm safety.
Irvine, CaliforniaAges 18 years+ - NCT06217822RecruitingPhase 1
Testing a new radiation therapy for advanced prostate cancer
This trial tests a new radioactive drug, 225Ac-PSMA-Trillium, that targets prostate cancer cells. It is for people whose advanced prostate cancer has stopped responding to hormone therapy and may have spread.
Duarte, CaliforniaAges 18 years+ - NCT06079671RecruitingPhase 3
Volrustomig for high-risk locally advanced cervical cancer
This trial tests a new medicine called volrustomig for women with locally advanced cervical cancer that has not spread. It is given along with standard chemoradiation and aims to improve outcomes.
La Jolla, CaliforniaAges 15 years+ - NCT06435429RecruitingPhase 3
Zanidatamab vs trastuzumab for HER2+ breast cancer
This study compares a new drug called zanidatamab against trastuzumab (Herceptin), both given with a chemotherapy of your doctor's choice. It is for people with HER2-positive breast cancer that has spread and who have already tried T-DXd treatment.
San Francisco, CaliforniaAges 18 years+ - NCT06022822RecruitingPhase 2
Urolithin A supplement before prostate cancer surgery
This trial tests whether taking a supplement called urolithin A for a few weeks before prostate removal surgery can help. The supplement comes from pomegranates and may slow cancer growth. You may qualify if you have prostate cancer, are planning surgery within 3-6 weeks, and have not had prior treatment like hormone therapy.
Los Angeles, CaliforniaAges 18 years+ - NCT06764875RecruitingPhase 3
New drug combo for HER2-positive stomach cancer
This trial tests a new immunotherapy called rilvegostomig combined with standard chemotherapy and a targeted therapy (trastuzumab deruxtecan) for people with advanced HER2-positive stomach or gastroesophageal junction cancer that has not been treated before.
Upland, CaliforniaAges 18 years+ - NCT06549465RecruitingPhase 2
Ac-225 rosopatamab for PSMA-positive castration-resistant prostate cancer
This trial tests a radioactive drug (Ac-225 rosopatamab tetraxetan) that targets a protein called PSMA on prostate cancer cells. It is for patients whose cancer has stopped responding to hormone therapy and has spread to other parts of the body.
San Diego, CaliforniaAges 18 years+ - NCT06050252RecruitingPhase 2
Durvalumab plus chemo before surgery for high-risk bile duct cancer
This study tests whether adding the immunotherapy drug durvalumab to standard chemotherapy (gemcitabine and cisplatin) before surgery helps people with a high-risk type of bile duct cancer live longer. If you qualify, you would receive the drug combination before your planned surgery.
Irvine, CaliforniaAges 18 years+ - NCT06072781RecruitingPhase 3
Study of Avutometinib + Defactinib for recurrent low-grade ovarian cancer
This trial tests a combination of two oral targeted drugs for people with recurrent low-grade serous ovarian cancer. It aims to see if this therapy works better than standard hormone therapy or chemotherapy options.
Los Angeles, CaliforniaAges 18 years+ - NCT06459869RecruitingPhase 1
NG-350A plus chemoradiotherapy for advanced rectal cancer
This trial is testing a new virus-based therapy (NG-350A) combined with standard chemoradiotherapy for people with locally advanced rectal cancer. It aims to see if the combination is safe and can help shrink tumors before surgery.
Los Angeles, CaliforniaAges 18 years+ - NCT07473128RecruitingPhase 3
Trilaciclib to prevent low blood cell counts in limited-stage small cell lung cancer
This trial tests whether taking trilaciclib alongside standard chemotherapy can help prevent low blood cell counts (myelosuppression) in people with limited-stage small cell lung cancer. It may help you stay stronger during treatment.
Oakland, CaliforniaAges 18 years+ - NCT04363164RecruitingPhase 2
Testosterone then enzalutamide to stop prostate cancer spread
This Phase 2 trial tests whether giving testosterone first, then enzalutamide (a prostate cancer hormone-blocking pill), can slow or prevent worsening metastatic prostate cancer. It is designed for men whose cancer progressed despite ongoing hormone-suppression treatment.
San Diego, CaliforniaAges 18–90 - NCT05125016RecruitingPhase 1/Phase 2
Study drug for advanced prostate cancer after standard treatments
This early-phase study tests whether REGN4336 is safe and how well it works, by itself or with REGN5678, in adults with advanced prostate cancer. It may help people whose cancer has continued to worsen despite standard prostate cancer medicines.
Palo Alto, CaliforniaAges 18 years+ - NCT06362252RecruitingPhase 1/Phase 2
I-DXd plus atezolizumab for first-line extensive SCLC
This trial tests a new combination of drugs (I-DXd and atezolizumab, with or without carboplatin) as your first treatment for extensive stage small cell lung cancer. It has two groups: one for people who haven't started treatment yet, and another for those who've already had 4 cycles of a standard chemo-immunotherapy combination and are stable or better.
Los Angeles, CaliforniaAges 18 years+ - NCT06888102RecruitingEarly Phase 1
Epigenetic therapy before prostate surgery
This trial tests a short course of 'epigenetic therapy' (drugs that change how genes work) given before prostate removal surgery. The goal is to see if it can improve treatment effects and help shrink or control the tumor.
Los Angeles, CaliforniaAges 18 years+ - NCT05775471RecruitingPhase 2
Check PD-1 plus enfortumab after kidney-urine-duct surgery
This Phase 2 study tests giving pembrolizumab (an immune therapy) and enfortumab vedotin (an antibody-drug medicine) before and after surgery to remove high-risk upper urinary tract cancer. The goal is to lower the chance the cancer comes back.
Los Angeles, CaliforniaAges 18 years+ - NCT06228053RecruitingPhase 2
Study of SX-682 plus enzalutamide for men with advanced prostate cancer
This trial tests whether adding the drug SX-682 to enzalutamide can help men whose prostate cancer has stopped responding to other hormone treatments. You may be eligible if your cancer is growing despite treatment with abiraterone, darolutamide, apalutamide, or enzalutamide.
Los Angeles, CaliforniaAges 18 years+
Cancer trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting cancer studies listed above.
- University of California, San Francisco · 5 studies
- University of California, Los Angeles (UCLA) · 4 studies
- City of Hope Comprehensive Cancer Center · 3 studies
- UC Irvine Health · 3 studies
- University of California San Diego · 3 studies
- University of California, Irvine Medical Center / UC Irvine Health · 3 studies
- USC / Norris Comprehensive Cancer Center · 3 studies
- Cedars-Sinai Medical Center · 2 studies
What taking part in a cancer study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Cancer trials in other states
Common questions
- Are there cancer clinical trials in California?
- Yes. We're currently tracking 1,311 recruiting cancer studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a cancer study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a cancer trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New cancer studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.