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, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06472245RecruitingPhase 3
Cancer vaccine for lung cancer that stopped responding to immunotherapy
This trial tests a therapeutic cancer vaccine called OSE2101 for people with advanced non-small cell lung cancer whose tumors stopped responding to an immunotherapy drug. The vaccine is designed to help your immune system fight the cancer in a different way.
Beverly Hills, CaliforniaAges 18 years+ - NCT06538038Recruiting
Osimertinib plus chemo vs. osimertinib alone for EGFR-mutated NSCLC
This study compares two standard treatments for advanced lung cancer with an EGFR mutation: osimertinib alone versus osimertinib plus chemotherapy. It aims to see which approach works better and is not a trial of a new drug, so you can receive usual care while contributing data.
San Jose, CaliforniaAges 18 years+ - NCT07690579Recruiting
Prostate cancer disparities study
This study looks at how social, lifestyle, and other factors affect prostate cancer outcomes. It enrolls men who have chosen to have their prostate removed (radical prostatectomy) and agreed to join a biobank.
San Francisco, CaliforniaAges 18 years+ - NCT06465329RecruitingPhase 2
Study of drug combinations for operable lung cancer
This trial tests different combinations of the immunotherapy cemiplimab and chemotherapy for people with stage II to IIIB non-small cell lung cancer that can be surgically removed. The goal is to see if adding other treatments helps more than the standard approach.
Orange, CaliforniaAges 18 years+ - NCT06605404Recruiting
Pan-tumor study of a blood test after cancer surgery
This study is testing a new blood test that looks for leftover cancer cells after surgery. It is for people with different types of solid tumors who are planning to have surgery to cure their cancer. The goal is to see if the test can help guide future treatment decisions.
San Diego, CaliforniaAges 18 years+ - NCT06616584RecruitingPhase 2/Phase 3
Cemiplimab plus standard care for advanced lung cancer after prior treatments
This trial tests whether adding the immunotherapy drug cemiplimab to standard treatment can help people with advanced lung cancer that has already progressed after both platinum chemo and a prior immunotherapy. It is designed for those who responded to their first immunotherapy for at least 12 weeks before the cancer started growing again.
Mather, CaliforniaAges 18 years+ - NCT06698458Recruiting
DaRT radiation plus chemo for advanced pancreatic cancer
This trial tests a new type of radiation called DaRT (Alpha DaRT) combined with standard chemotherapy for people with pancreatic cancer that is locally advanced or has spread. The goal is to see if adding this radiation treatment can help shrink tumors or slow the cancer's growth.
Los Angeles, CaliforniaAges 18–120 - NCT06342414Recruiting
Blood test to tell apart two types of liver cancer
This study uses a blood test (called a liquid biopsy) to help doctors tell the difference between two common types of liver cancer: hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC). If you have been diagnosed with one of these cancers and have a blood sample taken before starting curative treatment, this study may help improve diagnosis and care.
Duarte, CaliforniaAges 18 years+ - NCT05204147RecruitingPhase 1
Radioactive antibody for CEA-making advanced cancers
This early-phase trial tests a radioactive antibody (Ac225-DOTA-M5A) that targets CEA, a protein found on many cancer cells. It's for people with advanced or metastatic cancers that produce CEA and who have no good standard treatment options left.
Duarte, CaliforniaAges 18 years+ - NCT05941520RecruitingPhase 2
Acolbifene vs low-dose tamoxifen to prevent breast cancer
This Phase 2 trial compares acolbifene and low-dose tamoxifen to see which better lowers breast cancer risk in premenopausal women at high risk. You would be followed with health visits, blood tests, and a breast tissue sampling procedure.
Duarte, CaliforniaAges 35 years+ - NCT06881784RecruitingPhase 3
Study of a RAS-targeting pill for lung cancer
This trial tests a new daily pill (daraxonrasib/RMC-6236) for people with advanced non-small cell lung cancer that has a specific RAS mutation. It's for those who have already tried 1 or 2 previous treatments, including immunotherapy and chemotherapy.
Long Beach, CaliforniaAges 18 years+ - NCT07224750Recruiting
A blood test to find early signs of gastrointestinal cancer
This study is testing a blood-based test to detect unique molecules (called miRNAs) that may signal the presence of several types of gut or digestive system cancers. The goal is to develop a simple screening tool that could catch these cancers earlier.
Duarte, CaliforniaAges 18 years+ - NCT07227415RecruitingPhase 1/Phase 2
Study of a new drug for advanced kidney cancer
This trial tests a new drug, PF-08634404, alone or with other cancer treatments, for adults with advanced kidney cancer that has not been treated before. It aims to see if the drug can help shrink tumors or stop them from growing.
La Jolla, CaliforniaAges 18 years+ - NCT06708429Recruiting
Lynch syndrome and gut immune system study
This study looks at how the immune system interacts with the gut lining in people with Lynch syndrome and those without. It may help us better understand how Lynch syndrome affects the body.
Monrovia, CaliforniaAges 18 years+ - NCT06780176Recruiting
Breast cancer risk study for people in Florida
This study looks at breast cancer risk factors and outcomes by inviting people who are getting breast biopsies or are new breast patients at certain Florida hospitals to complete a survey. It aims to better understand what affects breast cancer risk and treatment results.
Los Angeles, CaliforniaAges 18 years+ - NCT06780787RecruitingPhase 2
Study of chemo plus immunotherapy for localized rectal cancer before surgery
This trial tests a combination of chemotherapy (FOLFOX) and two immunotherapies (botensilimab and balstilimab) before surgery for patients with localized rectal cancer. It aims to see if adding immunotherapy helps shrink the tumor and improve outcomes.
Duarte, CaliforniaAges 18 years+ - NCT06795009RecruitingPhase 1
Zanzalintinib plus paclitaxel for recurrent uterine cancer
This trial combines an experimental pill called zanzalintinib with a standard chemotherapy (paclitaxel) for people with advanced or recurrent high-grade uterine cancer who have already tried platinum-based chemotherapy. The goal is to see if this combination can help shrink or control the cancer better than standard options alone.
San Francisco, CaliforniaAges 18 years+ - NCT06811116RecruitingPhase 1/Phase 2
Adding sapanisertib to cabozantinib for beta-catenin mutant liver cancer
This trial tests whether adding a new drug (sapanisertib) to the usual chemotherapy (cabozantinib) can help people with advanced liver cancer that has a specific genetic change (beta-catenin mutation). It is for patients who have already had at least one prior treatment and are looking for a new option.
Irvine, CaliforniaAges 18 years+ - NCT06834126RecruitingPhase 1
Papaverine with radiation for advanced rectal cancer
This trial tests if adding papaverine (a drug) to radiation therapy can help people with locally advanced rectal cancer avoid surgery and keep their rectum. It is for patients who have already had chemotherapy and want a non-surgical approach.
Duarte, CaliforniaAges 18 years+ - NCT06896474Recruiting
Breast cancer treatment choice help for women 70 and older
This study tests a decision aid to help women 70 and older with early stage breast cancer choose their treatment. It looks at whether the tool helps patients and their doctors make a confident treatment choice.
Los Angeles, CaliforniaAges 18 years+ - NCT07005128RecruitingPhase 3
New Drug Combo for First-Line Extensive Small Cell Lung Cancer
This trial tests adding a new immunotherapy drug (tarlatamab) to the standard first-line chemo-immunotherapy for extensive-stage small cell lung cancer. It aims to see if the combination works better than the usual treatment alone.
Fullerton, CaliforniaAges 18–99 - NCT07029399RecruitingPhase 1
Study of NKT5097 for advanced solid tumors
This trial tests an experimental oral drug (NKT5097) for people with advanced solid tumors that have not responded to other treatments. It may also be an option for people with a specific type of breast cancer (HR+/HER2-). The goal is to see if the drug is safe and effective.
Duarte, CaliforniaAges 18 years+ - NCT07030686Recruiting
Exercise and quality of life in cancer survivors
This study looks at how exercise habits are linked to how cancer survivors feel and their health outcomes. It may help understand if starting to exercise improves well-being.
Duarte, CaliforniaAges 18 years+ - NCT07054346RecruitingPhase 1
Comparing two radiation drugs for high-risk prostate cancer before surgery
This trial tests two radioactive drugs (Lu-177 and Ac-225 PSMA-617) given before prostate removal surgery in men with high-risk prostate cancer that hasn't spread far. The goal is to see which drug works better at targeting cancer cells.
San Francisco, 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 · 10 studies
- City of Hope · 3 studies
- UC San Diego Moores Cancer Center · 3 studies
- University of California, San Francisco · 3 studies
- Cedars-Sinai Medical Center · 2 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 2 studies
- Presbyterian Intercommunity Hospital · 2 studies
- University of California, Irvine Medical Center / UC Irvine Health · 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.