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
- NCT06492122RecruitingPhase 1
Study of a radioactive drug for advanced prostate cancer
This trial tests a new radioactive treatment, [225Ac]Ac-FL-020, for men with metastatic castration-resistant prostate cancer (mCRPC) that has gotten worse despite other treatments. It's for those who have had at least one prior hormone therapy or chemotherapy.
Irvine, CaliforniaAges 18 years+ - NCT06469944RecruitingPhase 1/Phase 2
Study of drug combinations for stomach or esophagus cancer
This trial tests new combinations of drugs alongside standard chemotherapy for people with advanced stomach or esophagus cancer that has not been treated yet. It aims to see if these combinations can shrink tumors or slow down the cancer better than current options.
Los Angeles, CaliforniaAges 18 years+ - NCT06476808RecruitingPhase 1
Testing a new drug for advanced solid tumors
This trial tests an investigational drug (BMS-986463) in people with advanced solid tumors. It aims to find a safe dose and see if it helps shrink or control the cancer. You must be well enough to do daily activities and have a tumor that can be biopsied before treatment starts.
Los Angeles, CaliforniaAges 18 years+ - NCT06472765Enrolling by invitation
Study of the Vaginal Ecosystem in Healthy Women
This study looks at the natural balance of bacteria and other factors in the vagina of healthy women. It aims to learn more about what a healthy vaginal ecosystem looks like.
Fullerton, CaliforniaAges 18–89 - NCT06458712RecruitingPhase 1
Testing a new drug for advanced cancers with gene changes
This study tests a new oral drug, DSB2455, for people with advanced breast, prostate, ovarian, or pancreatic cancers that have certain gene changes. It aims to see if the drug is safe and whether it helps shrink or control the cancer.
Sacramento, CaliforniaAges 18 years+ - NCT06445972RecruitingPhase 1/Phase 2
Testing combination therapies for advanced stomach or esophageal cancer
This study tests new drug combinations for people with advanced stomach or esophageal cancer that worsened after first treatment. It aims to find better options for those whose tumors lack HER2.
Los Angeles, CaliforniaAges 18 years+ - NCT06432985Recruiting
Smoking cessation coaching for veterans with cancer
This study tests a counseling program to help veterans who smoke quit smoking, especially those undergoing cancer treatment or lung cancer screening. It may improve health outcomes during cancer care.
San Francisco, CaliforniaAges 18 years+ - NCT06436612RecruitingPhase 2
Study of radiation therapy for belly or pelvic sarcomas
This trial is testing a precise type of radiation therapy (called SBRT) for people with sarcoma in the belly or pelvic area. The goal is to see if this targeted radiation can help shrink or control the tumor before surgery, and it may be an option if you haven't had radiation to that area before.
Los Angeles, CaliforniaAges 12 years+ - NCT06423573Recruiting
Skin cancer risk in epidermolysis bullosa patients using Filsuvez
This study tracks anyone with dystrophic or junctional epidermolysis bullosa who is using Filsuvez gel to see how often skin cancers appear. It is designed to understand the long-term safety of the treatment.
Palo Alto, CaliforniaAges Any age - NCT06410209RecruitingPhase 2
Walking Juntos: Smartphone program to help Hispanic cancer survivors be active
This study will test if a smartphone program and social media group can help Hispanic/Latino teens and young adults who had childhood cancer become more physically active. You would wear a Fitbit and use a phone app with culturally tailored tips and support.
Downey, CaliforniaAges 15–20 - NCT06413680RecruitingPhase 1/Phase 2
Study of REGN10597 with or without cemiplimab for advanced solid tumors
This study tests a new drug called REGN10597, either alone or with cemiplimab, for people with advanced solid tumors (like melanoma or kidney cancer) that have not responded to standard treatments. The goal is to see if the combination can shrink tumors or slow their growth.
San Francisco, CaliforniaAges 18 years+ - NCT06418204Recruiting
Cannabis use among cancer patients in community clinics
This study looks at how cancer patients use cannabis (marijuana) and cannabis products to manage symptoms during chemotherapy or immunotherapy. The goal is to learn about the benefits and risks so doctors can better guide patients.
Antioch, CaliforniaAges 18 years+ - NCT06417190RecruitingPhase 2
Bladder preservation trial for muscle-invasive bladder cancer with variant histology
This trial tests a bladder-sparing approach for people with muscle-invasive bladder cancer that has a variant histology type. The goal is to avoid removing the bladder by using a combination of treatments.
Los Angeles, CaliforniaAges 18 years+ - NCT06408220Recruiting
Stomach cancer risk check for minority groups
This study checks if you are at high risk for stomach cancer. You will give blood samples and have a stomach exam (endoscopy) to look for early signs.
Duarte, CaliforniaAges 40–80 - NCT06393374RecruitingPhase 3
Study of a new drug combination for residual TNBC after initial treatment
This trial tests a new combination of two drugs (sacituzumab tirumotecan and pembrolizumab) compared to standard chemotherapy for people with triple-negative breast cancer that did not fully respond to initial treatment. It aims to see if this combination helps prevent cancer from coming back.
Fountain Valley, CaliforniaAges 18 years+ - NCT06385080RecruitingPhase 1/Phase 2
Study of amivantamab for head and neck cancer
This trial tests a drug called amivantamab, either alone or with other treatments, for people with head and neck cancer that has spread or come back. The goal is to see if the drug can help shrink tumors or control the cancer.
La Jolla, CaliforniaAges 18 years+ - NCT06389123RecruitingPhase 1
Targeted radiation for metastatic cancer that stopped responding
This study tests a new approach that first uses a special scan to find cancer cells that have a specific marker, then delivers targeted radiation to those cells. It is designed for people with advanced solid tumors that have spread and stopped responding to standard treatments.
Sacramento, CaliforniaAges 18 years+ - NCT06377852RecruitingPhase 3
CDK4/6 inhibitor dosing study for older adults with metastatic breast cancer
This study tests two targeted therapy drugs, palbociclib and ribociclib, combined with hormone therapy for people aged 60 or older with hormone receptor-positive, HER2-negative metastatic breast cancer. The goal is to see how well this treatment works and to gather information that may help improve dosing for older adults.
Eureka, CaliforniaAges 60 years+ - NCT06376565Recruiting
Improving colonoscopy follow-up for high-risk polyps
This study aims to understand why some people return for a follow-up colonoscopy after having high-risk colon polyps and to find ways to improve the process. It involves interviews and testing new approaches to ensure patients get the right follow-up care.
Los Angeles, CaliforniaAges 21 years+ - NCT06353386RecruitingPhase 1/Phase 2
Opevesostat combinations for advanced prostate cancer
This study tests a new drug called opevesostat, alone or combined with other treatments, for men with advanced prostate cancer that has spread and stopped responding to hormone therapy. It aims to see if it can help control the cancer.
La Jolla, CaliforniaAges 18 years+ - NCT06357533RecruitingPhase 3
New drug combo for advanced lung cancer with high PD-L1
This trial tests a new two-drug combination (Dato-DXd and an immunotherapy called rilvegostomig) as the first treatment for people with advanced non-squamous lung cancer who have high PD-L1 levels. The goal is to see if this combination works better than current standard options.
Newport Beach, CaliforniaAges 18 years+ - NCT06353997RecruitingPhase 2
Neoadjuvant INBRX-106 with pembrolizumab for early-stage triple-negative breast cancer
This trial tests whether adding an experimental drug called INBRX-106 to the standard immunotherapy (pembrolizumab) and chemotherapy before surgery can improve outcomes for patients with early-stage triple-negative breast cancer. The goal is to shrink the tumor and potentially reduce the risk of the cancer coming back.
Los Angeles, CaliforniaAges 18 years+ - NCT06337318RecruitingPhase 3
Comparing two drugs for low-tumor burden follicular lymphoma
This trial compares a standard drug called rituximab to a newer medicine called mosunetuzumab for people with a slow-growing type of lymphoma that is not causing many symptoms. The goal is to see if mosunetuzumab works better and has fewer side effects.
Beverly Hills, CaliforniaAges 18 years+ - NCT05197881Recruiting
Daily adaptive radiation for newly diagnosed cervical cancer
This study tests a radiation plan that is adjusted day by day to better match your cervix and surrounding tissues during treatment. It’s for newly diagnosed, advanced cervical cancer patients who will receive standard pelvic radiation and chemotherapy.
La Jolla, 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 · 4 studies
- Kaiser Permanente-Oakland · 3 studies
- Providence Medical Foundation - Santa Rosa · 3 studies
- Cedars-Sinai Medical Center · 2 studies
- Kaiser Permanente-Roseville · 2 studies
- Kaiser Permanente-Vallejo · 2 studies
- Kaiser Permanente-Walnut Creek · 2 studies
- UCLA Hematology/Oncology - Santa Monica · 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.