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
- NCT05361720RecruitingPhase 2
Genetic test to match treatment for advanced kidney cancer
This study looks at genetic (RNA) testing of kidney cancer tissue to help choose the best drug treatment. It may help guide therapy for people with advanced or metastatic clear cell kidney cancer who are starting treatment for the first time.
Orange, CaliforniaAges 18 years+ - NCT05274048RecruitingPhase 1
Neratinib plus antibody-drug for HER2-positive stomach or esophagus cancer
This early-phase trial tests neratinib together with an antibody-drug to treat advanced HER2-positive gastro-esophageal (stomach/esophagus) cancer that can’t be removed by surgery. It’s for people whose cancer has progressed after at least one HER2-targeted treatment, aiming to shrink tumors and improve outcomes.
Palo Alto, CaliforniaAges 18 years+ - NCT05285358RecruitingPhase 1
Aerosol chemo plus standard drugs for bile duct and gallbladder cancer
This trial tests a new way to give the drug paclitaxel directly into your belly as a mist, along with two standard chemo drugs given through your veins, for bile duct or gallbladder cancer that has spread to the lining of the belly. The goal is to see if this approach can better control the cancer in the belly.
Duarte, CaliforniaAges 18 years+ - NCT05123482RecruitingPhase 1/Phase 2
Study of an experimental drug for advanced solid tumors
This trial tests a new drug, called AZD8205, alone or with other medicines, for people with advanced or metastatic solid tumors that have not responded to standard treatment. It aims to see if the drug can shrink tumors or slow their growth.
Duarte, CaliforniaAges 18 years+ - NCT04981509RecruitingPhase 2
Check if 3 medicines help advanced kidney cancer
This Phase 2 trial tests whether combining bevacizumab, erlotinib, and atezolizumab can shrink or control advanced kidney cancer. It’s aimed at people with certain kidney-cancer subtypes (including HLRCC-related cases or papillary kidney cancer) and who have not had many prior targeted or immune treatments.
La Jolla, CaliforniaAges 12 years+ - NCT04900818RecruitingPhase 1
Givastomig for advanced solid cancers, including gastric and pancreas
This Phase 1 trial tests how safe and effective givastomig (TJ033721) is for advanced or metastatic solid tumors. It may help people whose cancer has grown despite standard treatment, or—if in the combination parts—specific cancers that meet certain lab test and tumor-marker requirements.
Orange, CaliforniaAges 18 years+ - NCT04734730RecruitingPhase 2
Talazoparib plus hormone therapy for metastatic prostate cancer
This trial tests whether talazoparib added to standard hormone therapy (ADT), along with abiraterone, can better control metastatic prostate cancer that hasn’t progressed despite starting hormone treatment. It may help people live longer and delay cancer worsening.
Duarte, CaliforniaAges 18 years+ - NCT04729114RecruitingPhase 1
Safety and dose test of PRL-02 shot for advanced prostate cancer
This Phase 1 study tests how safe PRL-02 depot (an injection) is and finds the best dose for men with advanced prostate cancer. It may help determine a new treatment option for cancers that have spread or are getting worse despite standard care.
Anaheim, CaliforniaAges 18 years+ - NCT04590326RecruitingPhase 1/Phase 2
Study of REGN5668 with or without immunotherapy in ovarian cancer
This Phase 1/2 study tests how safe REGN5668 is and how well it works in adult women with advanced gynecologic cancers. It compares REGN5668 given with cemiplimab alone, or cemiplimab plus fianlimab, and looks for responses in tumors that meet specific criteria.
Irvine, CaliforniaAges 18 years+ - NCT04434040RecruitingPhase 2
Atezolizumab and sacituzumab to prevent breast cancer return
This trial tests two medicines after surgery and chemotherapy to help lower the risk that triple-negative breast cancer comes back. It’s for people whose cancer still showed “residual” invasive disease after neoadjuvant (before-surgery) chemotherapy, and whose blood test shows traces of tumor DNA.
San Francisco, CaliforniaAges 18 years+ - NCT04172532RecruitingPhase 1/Phase 2
New targeted drug with radiation for locally advanced pancreatic cancer
This Phase 1/2 trial tests adding peposertib, a targeted anti-cancer drug, to standard radiation for people with locally advanced pancreatic adenocarcinoma. It aims to improve control of the cancer after initial chemotherapy and determine whether the combo is safe and effective.
Duarte, CaliforniaAges 18 years+ - NCT04181060RecruitingPhase 3
Osimertinib alone or with bevacizumab for EGFR-mutant lung cancer
This Phase 3 trial tests whether starting osimertinib with or without bevacizumab helps people with advanced EGFR-mutant lung cancer live longer and control the cancer better. Your EGFR mutation test result and past treatments are key to whether you can join.
Antioch, CaliforniaAges 18 years+ - NCT04198766RecruitingPhase 1/Phase 2
New OX40 immunotherapy for advanced solid tumors
This trial tests a new immunotherapy drug (INBRX-106) alone or with Keytruda (pembrolizumab) for adults with advanced solid tumors that have not responded to standard treatments. The goal is to see if the drug can help the immune system fight cancer.
Murrieta, CaliforniaAges 18 years+ - NCT03723928Recruiting
Blood test–guided monitoring for metastatic breast cancer treatment
This study checks whether specific blood “tumor marker” levels can help monitor how hormone receptor–positive, HER2-negative metastatic breast cancer responds to first-line therapy. It uses regular blood tests (and sometimes scans) to see if this marker-based monitoring is useful and reliable.
Carmichael, CaliforniaAges 18 years+ - NCT03526835RecruitingPhase 1/Phase 2
Study of MCLA-158 for advanced solid tumors
This trial tests a new experimental drug called MCLA-158 (petosemtamab) for people with advanced solid tumors, especially head and neck cancer or colorectal cancer, that have not responded to standard treatments. The study aims to see if this drug can shrink tumors or slow their growth.
San Diego, CaliforniaAges 18 years+ - NCT03191149RecruitingPhase 2
Osimertinib for lung cancer with an EGFR exon 20 change
This Phase 2 study tests osimertinib (a targeted lung cancer pill) in people with advanced non-small cell lung cancer (NSCLC) whose tumors have an EGFR exon 20 insertion. It aims to see how well osimertinib works for this specific EGFR mutation and how safe it is.
Burbank, 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+ - NCT01035112Recruiting
MRI check for suspicious breast changes
This study uses a breast MRI scan to look at suspicious areas in the breast. It may help doctors better tell which breast changes need closer follow-up like a biopsy.
Stanford, CaliforniaAges 21 years+ - NCT06340568RecruitingPhase 3
Study of an experimental drug vs. chemo for recurring uterine cancer
This trial is testing an experimental therapy against standard chemotherapy for people with endometrial cancer that has come back. The study looks for a certain protein (HER2) on cancer cells to decide which treatment group you may be in.
Los Angeles, CaliforniaAges 18 years+ - NCT07288034RecruitingPhase 2
Immunotherapy biomarkers for advanced lung cancer
This study looks at blood and tissue biomarkers to predict how well immunotherapy (with or without chemotherapy) works for advanced non-small cell lung cancer. It also helps decide the best second treatment if the first one stops working.
Corona, CaliforniaAges 18 years+ - NCT04305834RecruitingPhase 2
Abemaciclib plus hormone pills for metastatic breast cancer in older adults
This Phase 2 study tests whether abemaciclib combined with standard hormone (endocrine) therapy can better control metastatic breast cancer in people age 70 and older. It may help if your cancer has already grown despite prior hormone therapy and/or other cancer medicines.
Duarte, CaliforniaAges 70 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+ - NCT06827236RecruitingPhase 1/Phase 2
Testing a new combination treatment for advanced breast cancer
This study tests two experimental drugs, BNT323 and BNT327, together in people with advanced breast cancer. The goal is to find the best dose and see if the combination is safe and helpful.
Beverly Hills, CaliforniaAges 18 years+ - NCT04603209Recruiting
Check-in registry for radiation during breast-conserving surgery
This registry study tracks people with early-stage, single-area breast cancer to understand outcomes when radiation is given during breast-conserving surgery. It may help doctors improve treatment planning for patients like you.
Santa Monica, 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 · 8 studies
- City of Hope at Irvine Lennar · 3 studies
- Providence Saint Joseph Medical Center/Disney Family Cancer Center · 3 studies
- City of Hope South Pasadena · 2 studies
- Los Angeles Cancer Network · 2 studies
- Mission Hope Medical Oncology - Arroyo Grande · 2 studies
- Mission Hope Medical Oncology - Santa Maria · 2 studies
- Pacific Central Coast Health Center-San Luis Obispo · 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.