Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,320 recruiting cancer studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06844383RecruitingPhase 2
Talazoparib with or without enzalutamide for prostate cancer after prior treatment
This study tests a drug called talazoparib, either alone or combined with enzalutamide, in people with prostate cancer that has spread and has a specific genetic change. The goal is to see if this treatment can help control the cancer after previous therapies have stopped working.
La Jolla, CaliforniaAges 18 years+ - NCT06824467RecruitingPhase 3
Maintenance Therapy Study for Recurrent Ovarian Cancer
This study tests a new maintenance treatment (sacituzumab tirumotecan) versus standard care for people with ovarian cancer that has come back after responding to platinum-based chemotherapy. The goal is to see if it can keep the cancer from growing longer and improve quality of life.
Irvine, CaliforniaAges 18 years+ - NCT06789172RecruitingPhase 1
New drug OKN4395 with or without pembrolizumab for solid tumors
This trial tests a new oral drug called OKN4395, which targets a COX2-related immune pathway, alone or with the immunotherapy pembrolizumab, in people with advanced solid tumors. It may be an option if you have certain types of cancer that have stopped responding to other treatments.
Beverly Hills, CaliforniaAges 18 years+ - NCT06787612RecruitingPhase 2
New combination for platinum-resistant ovarian cancer
This study tests a new combination treatment (ubamatamab plus another drug) for people with ovarian cancer that no longer responds to platinum chemotherapy. It could be an option if your cancer has kept growing despite prior treatment.
La Jolla, CaliforniaAges 18 years+ - NCT06763328RecruitingPhase 3
Metformin for insulin resistance after breast cancer chemo
This study tests if metformin, a common diabetes medicine, can help reduce insulin resistance in women who finished chemotherapy for early-stage breast cancer. It aims to improve long-term health and prevent future problems.
Riverside, CaliforniaAges 18 years+ - NCT06728579RecruitingPhase 2
Group therapy for joint pain in breast cancer survivors
This study tests two supportive group programs—one using mindfulness skills, the other providing supportive talk therapy—to help breast cancer survivors manage joint pain caused by hormone-blocking pills. If you have ongoing joint pain and are taking an aromatase inhibitor, you may be able to join a free, video-based group.
San Diego, CaliforniaAges 18 years+ - NCT06722508Recruiting
Exercise and nutrition before head and neck cancer treatment
This study tests whether an exercise and nutrition program before your cancer treatment can help you recover better. You'll work with a coach to prepare your body for surgery or radiation.
Sacramento, CaliforniaAges 18 years+ - NCT06690775RecruitingPhase 2
Study of a new drug for platinum-resistant ovarian cancer
This trial tests an investigational drug called TORL-1-23 for people with ovarian cancer that has stopped responding to platinum chemotherapy. It aims to see if the drug can help shrink or control the cancer.
Palo Alto, CaliforniaAges 18 years+ - NCT06661720RecruitingPhase 3
Tivozanib and pembrolizumab after kidney cancer surgery
This trial is testing if adding the targeted therapy tivozanib to the immunotherapy drug pembrolizumab (Keytruda) can help prevent kidney cancer from coming back after all known tumors have been removed by surgery.
San Francisco, CaliforniaAges 18 years+ - NCT06654037RecruitingPhase 1
Testing abemaciclib plus 5-FU for advanced colorectal cancer
This trial is testing whether adding a targeted drug called abemaciclib to the standard chemotherapy 5-FU can help people with a specific type of advanced colorectal cancer (MSS) that has stopped responding to other treatments. The goal is to see if this combination is safe and effective.
Irvine, CaliforniaAges 18 years+ - NCT06607458RecruitingPhase 2
Liver-focused chemo for metastatic colorectal cancer
This trial tests giving high-dose melphalan directly into the liver's blood supply, followed by standard cancer therapy, for people whose colorectal cancer has spread mainly to the liver. The goal is to see if this approach is safer and works better than standard treatment alone.
Santa Monica, CaliforniaAges 18 years+ - NCT06545942RecruitingPhase 1
Studying MOMA-313 for advanced or metastatic solid tumors
This trial tests a new oral drug, MOMA-313, alone or with another drug (olaparib), in people whose cancer has a specific DNA repair problem (HR-deficient mutation). It aims to see if the drug can shrink tumors or slow their growth.
La Jolla, CaliforniaAges 18 years+ - NCT06538337Recruiting
Shorter radiation therapy for endometrial and cervical cancer
This trial tests a shorter, more targeted type of radiation therapy for people with endometrial or cervical cancer who have had surgery. It aims to reduce side effects by using daily scans to adjust the treatment plan.
Los Angeles, CaliforniaAges 18 years+ - NCT06543576RecruitingPhase 1/Phase 2
Radiation and drug therapy for stage IVB cervical cancer
This trial tests combining external and internal radiation with chemotherapy and immunotherapy for stage IVB cervical cancer that has not been treated before. The goal is to see if this approach can help shrink tumors and improve outcomes.
San Diego, CaliforniaAges 18 years+ - NCT06518057RecruitingPhase 2
Sparing memory during brain radiation for leptomeningeal metastases
This trial tests a special type of radiation that avoids the memory center of the brain (the hippocampus) while treating cancer that has spread to the lining of the brain and spinal cord. It may help reduce side effects on thinking and memory for people with breast or lung cancer.
San Francisco, CaliforniaAges 18 years+ - NCT06532006RecruitingPhase 3
HLX22 plus trastuzumab and chemo for HER2+ stomach cancer
This trial tests adding a new drug, HLX22, to the standard combination of trastuzumab and chemotherapy for people with HER2-positive stomach or gastroesophageal junction cancer that hasn't been treated yet. The goal is to see if this three-drug mix works better than the usual two-drug approach.
Anaheim, CaliforniaAges 18 years+ - NCT06515613RecruitingPhase 1
Testing CTIM-76 for recurrent ovarian and other advanced cancers
This trial tests a new drug, CTIM-76, in people whose ovarian, testicular, or endometrial cancer has come back and is not responding to standard treatments. It aims to see if the drug can shrink tumors or stop them from growing.
Beverly Hills, CaliforniaAges 18 years+ - NCT06470282RecruitingPhase 1/Phase 2
Drug combo plus radiation for muscle-invasive bladder cancer
This trial tests a combination of two drugs (enfortumab vedotin and pembrolizumab) plus radiation therapy for people with bladder cancer that has grown into the muscle layer. The goal is to see if this treatment can kill the cancer while avoiding the need for bladder removal surgery.
San Francisco, CaliforniaAges 18 years+ - NCT06444815RecruitingPhase 1
Study of VET3-TGI for advanced solid tumors
This trial tests an experimental treatment called VET3-TGI, which is injected directly into tumors. It is for people with advanced solid tumors who have already tried other treatments and are looking for new options.
Orange, CaliforniaAges 18 years+ - NCT06445738Recruiting
Can some women safely skip radiation after breast cancer surgery?
This trial is for women 50 and older with early-stage, hormone-positive or HER2-positive breast cancer. It tests whether it is safe to skip radiation therapy after a lumpectomy if an MRI before surgery shows the breast tissue looks a certain way.
San Francisco, CaliforniaAges 50 years+ - NCT06424327Recruiting
Lung cancer surgery registry
This study collects information from people having surgery to remove a small part of the lung (segmentectomy) for early-stage lung cancer. It helps doctors learn more about this surgery and its outcomes.
San Diego, CaliforniaAges 18 years+ - NCT06366490RecruitingPhase 1
Personalized vaccine for recurrent ovarian cancer
This trial tests a personalized cancer vaccine made from your own tumor cells. It is for women with advanced ovarian, fallopian tube, or primary peritoneal cancer that has returned after at least one round of platinum chemotherapy.
Duarte, CaliforniaAges 18 years+ - NCT06369285RecruitingPhase 2
Alisertib and hormone therapy for advanced breast cancer
This trial tests a new drug, alisertib, combined with hormone therapy for people with HR-positive, HER2-negative breast cancer that has spread or come back and is no longer curable. It may be an option if you've already tried at least two hormone therapies and a CDK4/6 inhibitor.
Beverly Hills, CaliforniaAges 18 years+ - NCT06343402RecruitingPhase 1
Study of BBO-8520 for advanced KRAS G12C lung cancer
This trial tests a new oral medication called BBO-8520 for advanced lung cancer with a specific gene change (KRAS G12C mutation). It aims to see if the drug is safe and effective, and may be combined with another drug (pembrolizumab) in some groups.
La Jolla, 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.
- City of Hope · 6 studies
- University of California, San Francisco · 4 studies
- Cedars-Sinai Medical Center · 2 studies
- Precision NextGen Oncology & Research Center · 2 studies
- UC Irvine Health/Chao Family Comprehensive Cancer Center · 2 studies
- UC San Diego Moores Cancer Center · 2 studies
- UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory Care · 2 studies
- University of California, Davis · 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 1,320 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.