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
- NCT07659782RecruitingPhase 2
Study of VS-7375 for KRAS G12D lung cancer
This trial tests a new drug, VS-7375, for people with advanced non-small cell lung cancer that has a specific genetic change called KRAS G12D. It's for those who have already tried chemo and immunotherapy, and whose cancer has continued to grow.
Los Angeles, CaliforniaAges 18 years+ - NCT06785636RecruitingPhase 1/Phase 2
New drug combination for advanced prostate cancer
This study tests a new drug (pocenbrodib) alone or combined with another hormone therapy (darolutamide) for men with advanced prostate cancer that has spread. It is for those who have already tried Pluvicto and one other hormone therapy, but not yet chemotherapy.
Fountain Valley, CaliforniaAges 18 years+ - NCT06678659RecruitingPhase 1/Phase 2
Study of REC-1245 for advanced solid tumors and lymphoma
This trial tests a new drug, REC-1245, for people with advanced solid tumors or certain lymphomas that have not responded to standard treatments. The goal is to see if the drug can shrink tumors or slow disease progression.
Duarte, CaliforniaAges 12 years+ - NCT04205968RecruitingPhase 2
Testing ramucirumab with chemo for advanced small bowel cancer
This trial studies whether adding ramucirumab to chemotherapy (either paclitaxel or FOLFIRI) works better for advanced small bowel adenocarcinoma that has already been treated with certain prior medicines. It may help shrink tumors or slow cancer growth in people whose cancer has progressed.
Anaheim, CaliforniaAges 18 years+ - NCT06103864RecruitingPhase 3
Study of Dato-DXd with or without durvalumab for advanced triple-negative breast cancer
This trial is testing whether a new drug combination (Dato-DXd with or without durvalumab) works better than standard chemotherapy plus pembrolizumab for people with a certain type of advanced triple-negative breast cancer that has a protein called PD-L1. The study aims to find a more effective treatment option for this specific group.
Duarte, CaliforniaAges 18 years+ - NCT07042295RecruitingPhase 2
Amivantamab or Cetuximab for Skin Cancer in People with Weakened Immune Systems
This trial tests two drugs, amivantamab with hyaluronidase or cetuximab, in people with weakened immune systems who have advanced skin cancer (squamous cell carcinoma). The goal is to see if these treatments can help shrink or control the cancer.
La Jolla, CaliforniaAges 18 years+ - NCT00900198Recruiting
Give cancer tissue samples to help future cancer research
This study collects tissue or other cancer-related samples to help researchers better understand cancer and develop better tests or treatments. You can join if you are being evaluated for or treated for cancer, and you agree to let your samples be used for research.
Sacramento, CaliforniaAges 2 months+ - NCT07365319RecruitingPhase 2/Phase 3
New drug combo for stage 4 lung cancer
This trial tests a new drug called EIK1001 combined with standard immunotherapy (pembrolizumab) and chemotherapy for people with stage 4 non-small cell lung cancer who have not been treated before. The goal is to see if adding EIK1001 helps shrink tumors more than the current standard treatment.
Glendale, CaliforniaAges 18 years+ - NCT06922539RecruitingPhase 1
Experimental drug ST-001 nanoFenretinide for small cell lung cancer
This phase 1 trial tests an experimental drug called ST-001 nanoFenretinide for people with small cell lung cancer that has returned or not responded to standard chemotherapy. The drug is a newer form of fenretinide, which is related to vitamin A, and may work differently to attack cancer cells.
Los Angeles, CaliforniaAges 18 years+ - NCT06452277RecruitingPhase 3
Testing sevabertinib for advanced HER2-mutated lung cancer
This trial compares a new targeted drug called sevabertinib against standard chemotherapy plus immunotherapy for people with advanced non-small cell lung cancer that has a specific HER2 gene mutation. The goal is to see if sevabertinib works better and is safe.
Newport Beach, CaliforniaAges 18 years+ - NCT07001748RecruitingPhase 2/Phase 3
Testing abdominal chemo plus standard chemo for stomach cancer spread
This trial tests adding the chemotherapy drug paclitaxel directly into the abdomen (intraperitoneal) along with standard IV chemotherapy for people with stomach or gastroesophageal junction cancer that has spread to the lining of the abdomen. The goal is to see if this combination helps control the cancer better than standard treatment alone.
Irvine, CaliforniaAges 18 years+ - NCT06295367Recruiting
Cost Communication and Financial Help for Newly Diagnosed Cancer Patients
This study looks at whether talking openly about treatment costs and providing guidance to find financial help can make a difference for people with newly diagnosed solid tumors. If you join, you will be asked to fill out surveys about your experience.
Arroyo Grande, CaliforniaAges Any age - NCT03193970Recruiting
Study recovery after bladder removal surgery
This trial looks at how patients recover after radical cystectomy, a surgery that removes the bladder for bladder cancer. It will study recovery patterns to help understand what recovery may look like and possibly improve care.
Stanford, CaliforniaAges 18 years+ - NCT07492641RecruitingPhase 3
A new drug plus letrozole for advanced HR+ breast cancer
This trial tests a new medicine (BGB-43395) combined with letrozole against the usual CDK4/6 inhibitor plus letrozole. It is for people with advanced or metastatic HR-positive, HER2-negative breast cancer who have not yet had treatment for advanced disease.
Fountain Valley, CaliforniaAges 18 years+ - NCT05356741RecruitingPhase 1/Phase 2
Study drug VIR-5818 with and without pembrolizumab
This early trial tests whether VIR-5818 given through a vein is safe and whether it works better when combined with pembrolizumab. It’s for adults with HER2-positive cancers that are locally advanced or spread, and the study checks safety, side effects, and early signs of effect.
Duarte, CaliforniaAges 18 years+ - NCT07544654RecruitingPhase 3
Study comparing obrixtamig plus chemotherapy for advanced neuroendocrine cancer
This trial tests a new drug called obrixtamig combined with standard chemotherapy for advanced neuroendocrine cancer (a rare type of cancer). You'd receive one cycle of standard chemotherapy first, then be randomly assigned to either continue with the new drug plus chemotherapy or standard chemotherapy alone.
Duarte, CaliforniaAges 18 years+ - NCT06467357RecruitingPhase 3
A study of T-DXd and rilvegostomig for HER2-positive bile duct cancer
This trial tests a new combination of two drugs (T-DXd and rilvegostomig) for people with advanced bile duct cancer that has not been treated before. The cancer must have high levels of a protein called HER2. This study compares the new drugs to standard treatments.
Fullerton, CaliforniaAges 18–99 - NCT07217171RecruitingPhase 1
Study of EVOLVE104 for advanced bladder and squamous cell cancers
This trial tests an experimental drug called EVOLVE104 for people with advanced bladder cancer or certain types of squamous cell cancers. It aims to see if the drug is safe and if it can help shrink tumors.
Duarte, CaliforniaAges 18 years+ - NCT06319027RecruitingPhase 2
Can brain scans help predict glioblastoma progression?
This trial is testing whether certain details on brain scans can help doctors better predict how brain cancer (glioblastoma) will progress. You may be eligible if you are newly diagnosed with this type of cancer and plan to receive standard treatment.
Los Angeles, CaliforniaAges 18 years+ - NCT05827081RecruitingPhase 3
Ribociclib plus endocrine therapy for early breast cancer
This trial studies whether adding ribociclib to standard hormone (endocrine) therapy lowers the risk of breast cancer coming back in early-stage, hormone-receptor–positive cancer. It mainly looks at safety and how well the treatment controls cancer after surgery and (sometimes) prior hormone treatment.
Beverly Hills, CaliforniaAges 18–100 - NCT07218146RecruitingPhase 3
Study of ZL-1310 vs Standard Care for Relapsed Small Cell Lung Cancer
This trial tests a new drug, ZL-1310, against standard treatments for people with small cell lung cancer that has returned after initial therapy. The goal is to see if ZL-1310 works better than other options.
La Jolla, CaliforniaAges 18 years+ - NCT06492616RecruitingPhase 3
Elacestrant vs standard hormone therapy for high-risk early breast cancer
This trial tests a new hormone therapy pill (elacestrant) against standard hormone therapy for people with a common type of early breast cancer (ER+, HER2-) that has a higher chance of returning. You may qualify if you've already been on hormone therapy for 2 to 5 years and want to see if a different pill works better.
Bakersfield, CaliforniaAges 18 years+ - NCT06561386RecruitingPhase 3
Testing a new drug combo for advanced lung cancer
This trial is comparing a new combination of two immunotherapy drugs (nivolumab and relatlimab) plus chemotherapy against the standard immunotherapy (pembrolizumab) plus chemotherapy for people with advanced non-squamous non-small cell lung cancer that has a certain protein (PD-L1) on at least 1% of its cells. The goal is to see if the new combination works better.
Los Angeles, CaliforniaAges 18 years+ - NCT07140016RecruitingPhase 1
Study of gilteritinib for advanced ALK-positive lung cancer
This trial tests an oral drug called gilteritinib for people with advanced ALK-positive non-small cell lung cancer that has progressed after prior ALK inhibitor treatment. It aims to see if gilteritinib can help when other treatments have stopped working.
Fullerton, 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 · 6 studies
- Providence Medical Foundation · 4 studies
- University of California, Irvine Medical Center / UC Irvine Health · 4 studies
- Cedars-Sinai Medical Center · 3 studies
- University of California, San Francisco · 3 studies
- USC / Norris Comprehensive Cancer Center · 3 studies
- Cancer and Blood Specialty Clinic · 2 studies
- Kaiser Permanente San Marcos Medical Offices · 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.