Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,311 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
- NCT01048281Recruiting
Study of stomach and esophagus cancer samples
This study looks at stomach (gastric) and esophagus cancer, using clinical information and tissue samples. It may help researchers better understand these cancers and improve future care.
Stanford, CaliforniaAges 18 years+ - NCT01034033Recruiting
Blood and tumor genetic study for BRCA and related risks
This study collects blood (and possibly tumor tissue) to learn how certain inherited gene changes relate to breast and ovarian cancer risk. It may help researchers understand which people are most likely to develop these cancers and how tumors differ in high-risk patients.
Stanford, CaliforniaAges 18 years+ - NCT06162221RecruitingPhase 1/Phase 2
Study of RAS inhibitors for advanced RAS-mutated lung cancer
This trial tests new drugs that target specific RAS mutations in advanced non-small cell lung cancer. It's for people whose cancer has a KRAS G12C, G12D, or other RAS mutation and who have already tried standard treatments.
Irvine, CaliforniaAges 18 years+ - NCT07432295RecruitingPhase 2
Givastomig plus nivolumab and chemo for advanced stomach cancer
This trial tests a new drug, givastomig, combined with standard immunotherapy (nivolumab) and chemotherapy for people with advanced stomach, gastroesophageal junction, or esophageal cancer. It is for people whose tumors have certain markers (CLDN18.2 and PD-L1) and who have not had treatment for advanced disease.
Duarte, CaliforniaAges 18 years+ - NCT06060613RecruitingPhase 1/Phase 2
OBX-115 cell therapy for advanced melanoma or lung cancer
This trial tests an experimental cell therapy called OBX-115 for people with advanced melanoma or non-small cell lung cancer that has not responded to standard treatments. The therapy uses your own immune cells to fight the cancer. The study aims to see if it is safe and effective.
Los Angeles, CaliforniaAges 18 years+ - NCT07102381RecruitingPhase 2
Zanidatamab plus chemo before surgery for HER2+ breast cancer
This trial tests a new drug called zanidatamab combined with chemotherapy to shrink HER2-positive breast cancer before surgery. It may help improve treatment outcomes for people with stage 2 or 3 breast cancer that has not spread.
Long Beach, CaliforniaAges 18 years+ - NCT07388524RecruitingPhase 3
Testing atezolizumab after surgery for early stage lung cancer
This trial tests if the immunotherapy drug atezolizumab can prevent early stage non-small cell lung cancer from coming back after surgery. It is for people whose tumors have high levels of a protein called PD-L1 (50% or more) and do not have certain gene changes (EGFR or ALK).
Beverly Hills, CaliforniaAges 18 years+ - NCT07524218Recruiting
Meal Timing During Cancer Treatment Recovery
This study looks at how the timing of meals during cancer treatment recovery affects how well you tolerate and respond to your therapy. Researchers want to learn whether eating during certain hours of the day might help your body handle chemotherapy, targeted drugs, or immunotherapy better.
Los Angeles, CaliforniaAges 18 years+ - NCT07193511RecruitingPhase 1/Phase 2
A new drug for advanced bladder and other solid tumors
This trial tests a new drug, AVZO-103, alone or with other treatments, for people with advanced bladder cancer or certain other solid tumors. It aims to find out if the drug is safe and effective.
San Francisco, CaliforniaAges 18 years+ - NCT07003295RecruitingPhase 2
Glofitamab for mantle cell lymphoma that returned after CAR-T
This trial tests a new drug, glofitamab, for mantle cell lymphoma that came back or didn’t respond after CAR-T cell therapy. It aims to see if glofitamab can shrink or control the lymphoma.
Duarte, CaliforniaAges 18 years+ - NCT03460977RecruitingPhase 1
Mevrometostat trial for hormone-resistant prostate cancer
This Phase 1 study tests mevrometostat (PF 06821497) in people with castration-resistant prostate cancer to see if it’s safe and how the body responds to it. It may be an option if your cancer is no longer controlled by hormone therapy and your organ health tests are within limits.
Anaheim, CaliforniaAges 18 years+ - NCT07776353Recruiting
Understanding weight loss in advanced cancer
This study looks at how weight loss and muscle loss affect people with advanced cancer. It aims to find different types of weight loss to better guide treatment and care.
Pleasanton, CaliforniaAges 18 years+ - NCT07480356RecruitingPhase 3
Testing a new bladder cancer treatment (TARA-002) vs standard chemo
This trial compares a new medicine called TARA-002, given directly into the bladder, to the doctor's choice of standard chemotherapy. It is for people with a high-grade, non-muscle invasive bladder cancer that has not been treated with BCG or has not had BCG recently.
Bakersfield, CaliforniaAges 18 years+ - NCT07306559RecruitingPhase 1
Testing a new drug for advanced solid tumors
This trial tests different doses of a new drug (BI 3820768) in people with advanced solid tumors, specifically germ cell tumors, endometrial cancer, or ovarian cancer. The goal is to see if the drug is safe and how well it works.
Los Angeles, CaliforniaAges 18 years+ - NCT06317662RecruitingPhase 2
Adding venetoclax and blinatumomab to chemo for infant leukemia
This trial tests adding two newer medicines (venetoclax and blinatumomab) to standard chemotherapy for infants with a specific type of leukemia. The goal is to see if this combination helps more babies stay cancer-free.
Loma Linda, CaliforniaAges Up to 12 months - NCT04423211RecruitingPhase 3
Surgery-recovered prostate cancer treated with PET-guided radiation
This trial tests whether adding targeted radiation guided by a PET scan (along with hormone therapy) can improve outcomes for prostate cancer that has come back after surgery. The PET scan helps doctors look for spots outside the usual radiation area so treatment can be tailored.
Arroyo Grande, CaliforniaAges 18 years+ - NCT04893109RecruitingPhase 2
Study compares two HER2 breast cancer treatments after surgery
This Phase 2 study tests two different medicines given after breast surgery to reduce the risk of cancer coming back. It is only for people with early-stage HER2-positive breast cancer with limited or no lymph node spread.
San Francisco, CaliforniaAges 18 years+ - NCT06770582RecruitingPhase 2
Adding immunotherapy to radiation for bladder cancer
This trial tests whether adding the immunotherapy drug pembrolizumab to radiation therapy works as well as or better than the usual chemotherapy given with radiation for a type of bladder cancer that has not invaded the muscle. It is for people whose cancer came back or has high-risk features and who would otherwise need to have their bladder removed.
Bakersfield, CaliforniaAges 18 years+ - NCT07421700RecruitingPhase 1/Phase 2
Study of PF-08634404 alone or with enfortumab vedotin for bladder cancer
This trial tests a new drug, PF-08634404, either by itself or together with another drug called enfortumab vedotin, for people with advanced bladder cancer that has spread. The goal is to see if these treatments can shrink tumors or slow the cancer's growth.
Alhambra, CaliforniaAges 18 years+ - NCT07541079RecruitingPhase 3
Testing a New Breast Cancer Drug for Women Who Can't Tolerate Current Therapy
This study tests giredestrant, a new hormone-blocking medication, in postmenopausal women with early-stage ER+ breast cancer who have experienced intolerable side effects from their current aromatase inhibitor therapy. The trial will measure how well you tolerate this new drug and how it affects your quality of life.
Fountain Valley, CaliforniaAges 18 years+ - NCT07166094RecruitingPhase 3
Rina-S vs standard therapy for advanced endometrial cancer
This trial tests a new drug called Rina-S (an antibody-drug conjugate) against standard treatments for advanced endometrial cancer that has returned after prior therapy. It may be an option if you have had at least 1 but no more than 3 prior treatments, including platinum chemo and immunotherapy.
Irvine, CaliforniaAges 18 years+ - NCT06995898Recruiting
Blood test study for early cancer detection
This study is testing a new blood test that may help find cancer early. You will give blood samples over a year, and researchers will check them for signs of cancer.
Pleasanton, CaliforniaAges 45–75 - NCT05985655RecruitingPhase 1/Phase 2
Study of GTAEXS617 for advanced solid tumors
This trial tests a new drug called GTAEXS617 for adults with certain advanced solid tumors that have not responded to standard treatments. It aims to see if the drug is safe and effective.
Los Angeles, CaliforniaAges 18 years+ - NCT04768426RecruitingPhase 2
Watching DNA in blood while taking capecitabine after breast cancer
This trial checks how a blood test that looks for cancer DNA (ctDNA) changes during and after you take capecitabine after early triple-negative breast cancer. It aims to see whether these blood test results can help monitor the chance of the cancer coming back.
Stanford, 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 Comprehensive Cancer Center · 5 studies
- Stanford University · 4 studies
- University of California, San Francisco · 3 studies
- USC / Norris Comprehensive Cancer Center · 3 studies
- Cedars-Sinai Medical Center · 2 studies
- City of Hope · 2 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 2 studies
- Kaiser Permanente Northern California · 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.