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
- NCT06171139Recruiting
Genetic counseling tool for Black men with prostate cancer
This study tests a new tool to help Black or African American men with prostate cancer understand genetic testing options. The goal is to improve counseling and decision-making about tumor genetic testing.
San Francisco, CaliforniaAges 18 years+ - NCT06173362RecruitingPhase 2
Abiraterone or darolutamide for advanced prostate cancer
This study is comparing two drugs, abiraterone and darolutamide, to see how well they work for advanced prostate cancer. You might join if your cancer has spread and your doctor agrees these treatments could help.
Sacramento, CaliforniaAges 18 years+ - NCT03418961RecruitingPhase 3
Study of heart-risk management for metastatic HER2 breast cancer
This trial follows people with metastatic HER2-positive breast cancer who are at higher risk for heart damage while on HER2-targeted therapy. Some participants are randomly assigned to different monitoring/heart-protection approaches to see what best helps keep the heart safe.
Mission Hills, CaliforniaAges 18 years+ - NCT06103669Recruiting
Local treatment for limited cancer spread
This trial tests whether using local treatments (like targeted radiation or ablation) on a few new spots of cancer can help people whose cancer is otherwise stable on their current treatment. It enrolls people with various solid tumors, such as breast, gynecologic, head & neck, sarcoma, or other types.
Sacramento, CaliforniaAges 18 years+ - NCT06092892RecruitingPhase 2
Upfront targeted lymph node removal for early breast cancer
This trial is for women age 45 and older with early ER-positive breast cancer that has spread to the lymph nodes under the arm. It tests a surgery approach where the main tumor and only a few key lymph nodes (rather than many) are removed.
Los Angeles, CaliforniaAges 45 years+ - NCT06099769RecruitingPhase 2
Testing enzalutamide with or without mifepristone for AR-positive breast cancer
This trial tests if adding the drug mifepristone to the standard antiandrogen enzalutamide works better than enzalutamide alone or chemotherapy for people with a specific type of breast cancer that has androgen receptors. It aims to find a new targeted treatment option for triple-negative or ER-low breast cancer.
San Francisco, CaliforniaAges 18 years+ - NCT06075810RecruitingPhase 1
Oral MBQ-167 for advanced breast cancer
This trial tests an experimental oral drug, MBQ-167, for people with advanced breast cancer who have tried other treatments or have no standard options left. The goal is to see if the drug can help slow or stop the cancer.
Beverly Hills, CaliforniaAges 21 years+ - NCT05024929Recruiting
Test targeted drugs to help radioactive iodine reach thyroid cancer
This study looks at whether certain cancer “targeted therapy” medicines can make radioactive iodine (RAI) therapy work better for thyroid cancer that has spread to the lungs. It also involves taking special whole-body scans to measure how much radioactive iodine gets taken up by the cancer.
San Francisco, CaliforniaAges birth+ - NCT06031688RecruitingPhase 2
Targeted treatment for lung cancer with a MET gene change
This trial tests a targeted drug for advanced non-small cell lung cancer that has a specific genetic change called MET exon 14 skipping. It aims to see if the drug can shrink tumors or slow the cancer's growth, and may help people who have or haven't had prior treatment.
Anaheim, CaliforniaAges 18 minutes+ - NCT06026410RecruitingPhase 1
KO-2806 for advanced solid tumors
This trial tests a new drug called KO-2806, alone or with other treatments, for people with advanced solid tumors that have specific gene changes (like HRAS or KRAS mutations). It may help if standard treatments have stopped working.
Los Angeles, CaliforniaAges 18 years+ - 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+ - NCT05984589Recruiting
Personal health coaching for colorectal cancer survivors
This study tests a personalized health coaching program to help colorectal cancer survivors improve their lifestyle habits, such as diet and physical activity, which may improve their health and well-being.
Los Angeles, CaliforniaAges 18 years+ - NCT05946213RecruitingPhase 3
Shorter radiation treatment for high-risk prostate cancer
This trial tests whether a shorter course of radiation works as well as the usual longer course for people with high-risk prostate cancer. The goal is to keep cancer control while possibly reducing treatment time and inconvenience.
Fremont, 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+ - NCT05887609RecruitingPhase 2
Maintenance treatment for FRalpha-positive ovarian or endometrial cancer
This Phase 2 trial tests a combination of two medicines (mirvetuximab soravtansine and olaparib) as ongoing “maintenance” treatment after your best response to prior platinum chemotherapy. It may help keep cancer from growing longer in certain women whose tumors strongly match a specific marker (FRalpha).
Irvine, CaliforniaAges 18–100 - NCT05877599RecruitingPhase 1
Study of a new treatment for advanced cancers with a specific gene change
This trial tests a new type of therapy (NT-175) for people with certain advanced cancers that have a specific genetic change. It might help if your tumor has the TP53 R175H mutation and you have the HLA-A*02:01 immune marker.
Santa Monica, CaliforniaAges 18 years+ - NCT05872295RecruitingPhase 1
Study drug for HER2-positive advanced cancers
This Phase 1 trial tests IKS014 to see how safe it is and how well it works in advanced solid tumors that have HER2. You may be eligible if your tumor is HER2-positive (including certain “low HER2” types) and your body’s blood counts and organ function are strong enough.
Newport Beach, CaliforniaAges 18 years+ - NCT05789082RecruitingPhase 1/Phase 2
Divarasib for untreated lung cancer with KRAS G12C
This trial studies divarasib to see if it is safe and can shrink or control advanced lung cancer. Participants must have a KRAS G12C mutation and have not had prior treatment for their advanced disease.
Duarte, CaliforniaAges 18 years+ - NCT05774951RecruitingPhase 3
Camizestrant for hormone-positive, HER2-negative early breast cancer
This trial tests camizestrant, a medicine that blocks estrogen signaling, to help prevent hormone-positive, HER2-negative early breast cancer from coming back. You may be eligible if your cancer has higher- or intermediate-risk features and you already completed at least 2 years of hormone therapy.
Anaheim, CaliforniaAges 18–130 - NCT05691465RecruitingPhase 2
Radiation drug for metastatic prostate cancer with neuroendocrine cells
This Phase 2 study tests whether a radioactive medicine called lutetium Lu 177 dotatate is safe and effective for metastatic prostate cancer that has neuroendocrine features. It also checks whether patients’ scans show the cancer absorbs the drug (a requirement to start treatment).
Duarte, CaliforniaAges 18 years+ - NCT05642572RecruitingPhase 2
Test drug combinations for EGFR- and MET-changed lung cancer
This Phase 2 trial tests combinations of targeted medicines to treat advanced non-small cell lung cancer (NSCLC) that has changes in both EGFR and MET genes. It is for people whose cancer continued to grow even after treatment with osimertinib, the most recent therapy.
Auburn, CaliforniaAges 18 years+ - NCT05640999RecruitingPhase 2
Trial for early uterine cancer with POLE mutation after surgery
This Phase 2 trial studies an added (adjuvant) treatment for early-stage uterine cancer that has a specific genetic change called POLE mutation and does not have a p53 abnormal pattern. The goal is to lower the risk of the cancer coming back after surgery.
Los Angeles, CaliforniaAges 18 years+ - NCT05652686RecruitingPhase 1/Phase 2
Studying PT217 for neuroendocrine cancers
This trial tests a new drug called Peluntamig (PT217) for people with certain types of neuroendocrine cancers, like small cell lung cancer. It aims to see if the drug can help when standard treatments stop working or aren't an option.
Duarte, CaliforniaAges 18 years+ - NCT05624996RecruitingPhase 3
Targeted high-dose radiation added to standard lung cancer treatment
This trial tests whether adding high-dose, targeted radiation to the usual treatment helps people with locally advanced, non-operable lung cancer live longer or better control the cancer. It may help shrink tumors in the chest and improve outcomes when surgery can’t be done.
Bakersfield, 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.
- Cedars-Sinai Medical Center · 6 studies
- University of California, Davis · 6 studies
- City of Hope · 5 studies
- USC Norris Comprehensive Cancer Center · 5 studies
- Kaiser Permanente-San Francisco · 4 studies
- Kaiser Permanente-Vallejo · 4 studies
- Sutter Medical Center Sacramento · 4 studies
- California Pacific Medical Center · 3 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.