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
- NCT05987241RecruitingPhase 2/Phase 3
Using a blood test to guide immunotherapy after bladder/kidney cancer surgery
This study tests whether a blood test that detects tumor DNA can help guide the use of immunotherapy (nivolumab with or without relatlimab) after surgery for urothelial cancer. The goal is to see if starting immunotherapy based on the blood test results can prevent the cancer from coming back.
Anaheim, CaliforniaAges 18 years+ - NCT07405801RecruitingPhase 2
Inavolisib plus ribociclib plus fulvestrant for advanced breast cancer
This trial tests a combination of three drugs (inavolisib, ribociclib, and fulvestrant) compared to a placebo plus two of the drugs (ribociclib and fulvestrant) for people with advanced hormone receptor-positive breast cancer who have not had prior treatment for advanced disease. The goal is to see if adding inavolisib improves outcomes.
Anaheim, CaliforniaAges 18 years+ - NCT04858334RecruitingPhase 2
Olaparib after pancreatic cancer surgery for BRCA or PALB2 mutations
This trial studies whether olaparib (a targeted cancer medicine) can help prevent pancreatic cancer from coming back after surgery in people with BRCA1, BRCA2, or PALB2 mutations. You would get olaparib or a placebo (inactive pill) and be closely followed to see if recurrence is reduced.
Arroyo Grande, CaliforniaAges 18 years+ - NCT07541170RecruitingPhase 3
Testing divarasib after lung cancer surgery and chemotherapy
This study tests whether a drug called divarasib can help prevent lung cancer from coming back after surgery and initial treatment. You would only qualify if your cancer has a specific genetic mutation (KRAS G12C) and you've already had surgery and chemotherapy with immunotherapy.
Clovis, CaliforniaAges 18 years+ - NCT07361510RecruitingPhase 3
Pumitamig vs Keytruda for advanced lung cancer with high PD-L1
This trial compares an experimental drug called Pumitamig with the approved immunotherapy drug Pembrolizumab (Keytruda) as the first treatment for advanced lung cancer that has high PD-L1 levels. The goal is to see which drug works better and has fewer side effects.
Anaheim, CaliforniaAges 18 years+ - NCT07647328RecruitingPhase 3
Camizestrant and ribociclib for advanced hormone-receptor-positive breast cancer
This trial tests a combination of two drugs (camizestrant and ribociclib) for advanced breast cancer that is hormone-receptor-positive and HER2-negative. The study aims to see if this combination helps patients whose cancer cannot be surgically removed or treated with radiation alone.
Duarte, CaliforniaAges 18–130 - NCT06067841RecruitingPhase 1
New drug for advanced prostate cancer
This study tests a new drug (BMS-986460) for people with advanced prostate cancer that has stopped responding to hormone therapy. It aims to see if the drug can shrink or slow the cancer.
Palo Alto, CaliforniaAges 18 years+ - NCT07063745RecruitingPhase 2/Phase 3
Comparing a new drug combo for advanced lung cancer with a specific gene change
This trial tests a new drug called Navlimetostat combined with pembrolizumab and chemotherapy versus a placebo with the same standard treatments. It is for people with metastatic non-small cell lung cancer that has a specific missing gene (MTAP deletion) and who have not had prior treatment for their advanced disease.
Los Alamitos, CaliforniaAges 18 years+ - NCT06998407RecruitingPhase 1/Phase 2
Study of AVZO-023 for advanced solid tumors
This trial tests a new drug, AVZO-023, alone or with other treatments, for people with advanced solid tumors that have not responded to standard therapy. The goal is to see if it can shrink tumors or slow their growth.
Los Angeles, CaliforniaAges 18 years+ - NCT07100106RecruitingPhase 1/Phase 2
Study of GDC-4198 alone or with giredestrant for advanced breast cancer
This trial tests a new treatment (GDC-4198) alone or with another drug (giredestrant) compared to a standard combination (abemaciclib and giredestrant) for people with advanced hormone receptor-positive, HER2-negative breast cancer that has progressed after previous treatments.
Duarte, CaliforniaAges 18 years+ - NCT05327010RecruitingPhase 2
Testing a new drug combination for advanced solid tumors
This trial is studying whether a new combination of two cancer drugs, ZEN003694 and talazoparib, can help people with advanced solid tumors that have not responded to other treatments. Talazoparib is a type of drug that targets cancer cells with certain DNA repair problems. The study is divided into groups based on specific gene mutations or previous treatment responses.
Duarte, CaliforniaAges 18 years+ - NCT06638307RecruitingPhase 1
Study of new drug MEN2312 for advanced breast cancer with specific genetic changes
This trial tests a new drug, MEN2312, for people with advanced breast cancer that has specific genetic changes in PIK3CA, AKT1, or PTEN. It's for those who have already tried certain hormone therapies and a CDK4/6 inhibitor combination, and the cancer has continued to grow.
Duarte, CaliforniaAges 18 years+ - NCT07566052RecruitingPhase 3
Comparing a new KRAS drug to docetaxel for advanced lung cancer
This trial tests a new pill (setidegrasib) against a standard chemo drug (docetaxel) for people with a specific type of advanced lung cancer that has a KRAS G12D mutation. The goal is to see which treatment works better.
Glendale, CaliforniaAges 18 years+ - NCT06475989RecruitingPhase 3
Targeted Drug Combo vs. Chemo for Advanced Thyroid Cancer
This study tests a new combination of targeted drugs (dabrafenib and trametinib) compared to chemotherapy (cabozantinib) for people with a specific type of advanced thyroid cancer called BRAF-mutated differentiated thyroid cancer. The goal is to see which treatment works better.
Burbank, CaliforniaAges 18 years+ - NCT07368998RecruitingPhase 2
Study of inavolisib plus fulvestrant for advanced breast cancer
This trial tests whether a new targeted pill (inavolisib) plus hormone therapy (fulvestrant) can slow or stop breast cancer growth in people whose cancer has a specific genetic change called a PIK3CA mutation. It is for patients whose disease worsened after previous hormone-and-CDK-inhibitor treatment.
Los Angeles, CaliforniaAges 18 years+ - NCT07566156RecruitingPhase 3
New drug combination vs. radiation for bladder cancer preservation
This trial tests whether two drugs (enfortumab vedotin and pembrolizumab) work better than radiation with chemotherapy for muscle-invasive bladder cancer. The goal is to treat your cancer while keeping your bladder instead of removing it.
Santa Barbara, CaliforniaAges 18 years+ - NCT07214779RecruitingPhase 3
New drug vs chemo for platinum-resistant ovarian cancer
This study tests a new drug (INCB123667) given as a pill, compared to standard chemotherapy, for people whose ovarian cancer has stopped responding to platinum-based treatments and whose tumor has high levels of a protein called Cyclin E1. The goal is to see if the new drug works better than standard chemo for this specific type of cancer.
Duarte, CaliforniaAges 18 years+ - NCT06510374RecruitingPhase 3
Gene therapy vs. observation for intermediate risk bladder cancer
This trial tests a new gene therapy called nadofaragene firadenovec versus just watching and waiting (observation) for people with a specific type of bladder cancer that hasn't grown into the muscle. The goal is to see if the gene therapy can help keep the cancer from coming back.
Bakersfield, CaliforniaAges 18 years+ - NCT07284849RecruitingPhase 3
Testing a new drug combo for advanced colorectal cancer
This trial tests whether adding an experimental drug (INCA33890) to standard chemotherapy and bevacizumab helps people with a certain type of advanced colorectal cancer. It is for those whose cancer has spread and has not been treated yet with systemic therapy.
Fountain Valley, CaliforniaAges 18 years+ - NCT07659795RecruitingPhase 2
Study of VS-7375 for KRAS G12D colorectal cancer
This trial tests a new targeted pill, VS-7375, for people with a specific type of advanced colorectal cancer called KRAS G12D. It's for those who either haven't had treatment yet or whose cancer has worsened after prior therapy.
Los Angeles, CaliforniaAges 18 years+ - NCT07512271Recruiting
AI Education Tool for Breast Cancer Patients
This study tests a new computer-based education module created by artificial intelligence to help breast cancer patients understand their diagnosis and treatment options. The goal is to see if this tool helps patients feel more informed and prepared for their care.
San Francisco, CaliforniaAges 18 years+ - NCT07037758RecruitingPhase 1
Study of tarlatamab and AB248 for extensive stage small cell lung cancer
This trial tests a new combination of two drugs, tarlatamab and AB248, for people with extensive stage small cell lung cancer that has worsened after at least one prior treatment. The goal is to see if this combination can help shrink tumors or slow the cancer's growth.
Los Angeles, CaliforniaAges 18–90 - NCT06675136RecruitingPhase 1
Nab-paclitaxel PIPAC with paclitaxel and ramucirumab for stomach cancer spread to belly lining
This trial tests a new way to deliver chemotherapy directly into the belly for stomach cancer that has spread to the lining of the abdomen (peritoneal metastases). It also combines two standard chemotherapy drugs. The goal is to see if this approach can help people whose cancer progressed after first treatment.
Duarte, CaliforniaAges 18 years+ - NCT06626022RecruitingPhase 3
Micro-ultrasound vs MRI for prostate cancer screening
This trial compares two imaging methods, high-resolution micro-ultrasound and MRI, to see which is better at finding prostate cancer in men who have not had a biopsy before. If you are between 50 and 70 with an elevated PSA or abnormal exam, you may be able to join.
Los Angeles, CaliforniaAges 50–70
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
- Providence Medical Foundation · 4 studies
- UC San Diego Moores Cancer Center · 4 studies
- Keck Medicine of USC · 3 studies
- Los Angeles Cancer Network · 3 studies
- University of California, San Francisco · 3 studies
- USC / Norris Comprehensive Cancer Center · 3 studies
- City of Hope Orange County Lennar Foundation Cancer 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.