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, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT05645536Enrolling by invitationPhase 3
Safety follow-up for hormone-positive, HER2-negative breast cancer
This trial studies the safety of continuing endocrine therapy with ovarian suppression (for women) after you finish the earlier OVELIA study. It may help doctors confirm that the treatment remains safe for longer-term use.
Greenbrae, CaliforniaAges 18–51 - NCT05646862RecruitingPhase 3
Comparing two treatments for advanced breast cancer with a PIK3CA mutation
This trial tests whether a new drug combo (inavolisib plus fulvestrant) works better than an existing one (alpelisib plus fulvestrant) for people with a specific type of advanced breast cancer that has a PIK3CA mutation. It aims to find a treatment that may help control the cancer longer.
Los Angeles, CaliforniaAges 18 years+ - NCT05673148RecruitingPhase 2
Adding targeted tumor treatment to standard therapy for limited metastatic colorectal cancer
This trial tests whether adding a precise, targeted treatment to destroy remaining cancer spots (called total ablative therapy) after initial chemotherapy can improve outcomes for people with limited metastatic colorectal cancer. It aims to see if this extra treatment is safe and effective.
Beverly Hills, CaliforniaAges 18 years+ - NCT05593497RecruitingPhase 2
Combination therapy before prostate surgery for high-risk prostate cancer
This study tests a combination of hormone therapy and a targeted drug before prostate surgery for men with high-risk prostate cancer that has not spread. The goal is to see if this approach can improve outcomes.
West Los Angeles, CaliforniaAges 18 years+ - NCT05633654RecruitingPhase 3
Test drug combo versus standard care for triple-negative breast cancer
This trial tests a cancer antibody-drug combination plus pembrolizumab (immunotherapy) versus standard treatment. It’s for people with triple-negative breast cancer that still has invasive disease in the breast or lymph nodes after surgery and chemotherapy before surgery.
Berkeley, CaliforniaAges 18 years+ - NCT05592626RecruitingPhase 1/Phase 2
T cell activator STAR0602 for advanced solid tumors
This study tests an experimental drug called STAR0602 that aims to boost your immune system's T cells to fight advanced solid tumors. It's for patients whose cancer has not responded to standard treatments or for whom such treatments are not suitable.
Sacramento, CaliforniaAges 18 years+ - NCT05564390RecruitingPhase 2
MyeloMATCH screening to match you to AML or MDS treatment
This study screens people with newly suspected acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) to see which treatment approach fits best—either a specific study treatment or standard care. It may help by directing you to the right option and by sharing your blood/bone marrow samples for research.
Berkeley, CaliforniaAges 18 years+ - NCT05588388RecruitingPhase 2
Testing bevacizumab with chemo and immunotherapy for small cell lung cancer
This Phase 2 trial studies whether adding bevacizumab to chemo plus immunotherapy (including atezolizumab) can improve outcomes in extensive-stage small cell lung cancer (ES-SCLC) that has spread to the liver. It may help by blocking tumor blood vessel growth while boosting anti-cancer immune and treatment effects.
Los Angeles, CaliforniaAges Any age - NCT05467748RecruitingPhase 1/Phase 2
Study drug combo for advanced lung cancer after PD-1 treatment
This Phase 1/2 trial tests a combination of an EZH2 inhibitor (tulmimetostat) with a PD-1 blocker (pembrolizumab) for advanced non-small cell lung cancer that has stopped responding to prior PD-1 treatment. It may help shrink or control cancer and is mainly aimed at people who have limited treatment options left.
Long Beach, CaliforniaAges 18 years+ - NCT05503797RecruitingPhase 2
Study of FORE8394 for cancers with BRAF changes
This trial tests a new drug, FORE8394, for people whose cancers have a change in the BRAF gene. It may be an option if you have a solid tumor or brain tumor that has not responded to other treatments.
Westwood, Los Angeles, CaliforniaAges 8 years+ - NCT05491226RecruitingPhase 2
Pembrolizumab plus radiation and myeloid-targeting for high-risk breast cancer
This trial studies whether adding pembrolizumab (an immune “unlocking” drug) to radiation and another treatment that targets certain immune cells can improve outcomes for women with high-risk, early-stage triple negative breast cancer. You may be considered if your cancer has signs that it may respond less to immunotherapy on its own.
Los Angeles, CaliforniaAges 18 years+ - NCT05432804RecruitingPhase 1/Phase 2
Selinexor added to temozolomide for recurring brain glioblastoma
This trial studies whether adding selinexor to the standard chemotherapy temozolomide (with radiation) can better treat glioblastoma that has come back after prior treatment. If you meet specific tumor, health, and lab requirements, the goal is to slow tumor growth or improve symptoms.
Duarte, CaliforniaAges 18 years+ - NCT05456841Recruiting
Empathic communication training for lung cancer care
This trial tests whether training healthcare providers in empathetic communication improves their interactions with people receiving lung cancer care. You may be invited because your doctor’s clinic is participating and you meet the patient and language requirements.
Irvine, CaliforniaAges 18–100 - NCT05415007Recruiting
Support program for parents and teens after a new cancer diagnosis
This study tests a brief program meant to reduce anxiety and build resilience in families when a child was newly diagnosed with cancer. It involves both the parent and the child (ages 8–17) and requires consent/assent and English ability.
San Francisco, CaliforniaAges 8–18 - NCT05379985RecruitingPhase 1/Phase 2
Test drug RMC-6236 for certain RAS mutations in advanced cancers
This trial tests whether RMC-6236 can treat advanced solid tumors that have specific RAS-related gene changes (especially certain KRAS G12 mutations). You may be able to join if your tumor’s DNA test shows the right mutation and your overall health is good enough for study visits.
Orange, CaliforniaAges 18 years+ - NCT05379595RecruitingPhase 1/Phase 2
Amivantamab for advanced colon or rectal cancer with specific tumor traits
This Phase 1/2 study tests amivantamab alone or combined with standard chemotherapy to treat advanced or metastatic colon or rectal cancer. You may be able to join if your tumor has the right genetic profile (typically “wild-type” for certain genes and no HER2 amplification) and your cancer has measurable or biopsy-able lesions.
Los Angeles, CaliforniaAges 18 years+ - NCT05396872Recruiting
Decision-making study about gene testing for advanced prostate cancer
This study looks at how Veterans with advanced prostate cancer make decisions about gene testing and possible targeted treatments, and how patients and caregivers understand the information. It may help by improving decision support for people facing germline and tumor testing choices.
San Francisco, CaliforniaAges 18 years+ - NCT05376878RecruitingPhase 4
PET/MRI scan to guide treatment in HER2+ brain metastatic breast cancer
This trial tests a special PET/MRI imaging scan using a labeled drug to help doctors evaluate HER2+ breast cancer that has spread to the brain. It focuses on patients who plan to receive fam-trastuzumab deruxtecan, a targeted cancer medicine, and aims to see how well the scan can support treatment decisions.
Duarte, CaliforniaAges 18 years+ - NCT05270213RecruitingPhase 1
RBS2418 for advanced cancers after standard treatments
This early-phase study tests RBS2418 in people with advanced, metastatic solid tumors that have not responded to standard treatment. It aims to see if the drug can shrink tumors or help control disease, and to learn what doses are safest.
Santa Monica, 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+ - NCT05318469RecruitingPhase 1/Phase 2
Ivermectin with immunotherapy for metastatic triple-negative breast cancer
This trial studies whether ivermectin, given together with immunotherapy (balstilimab or pembrolizumab), can help treat metastatic triple-negative breast cancer. It mainly looks at safety first, and may also explore how well the treatment works for people whose cancer has spread.
Los Angeles, CaliforniaAges 18 years+ - NCT05294302Recruiting
Online support program for cancer parents in English or Spanish
This trial tests an online (e-health) counseling and support program for parents of children with cancer. It may help you feel better supported and more informed while caring for your child.
Los Angeles, CaliforniaAges Any age - NCT05302583Recruiting
Aromatherapy inhaler for stress during stem cell transplant
This trial tests whether using a lavender or peppermint aromatherapy inhaler can reduce distress (stress or discomfort) for adults during stem cell transplant care. It’s for people who are getting chemotherapy before the transplant and who do not have allergies to those essential oils.
Stanford, CaliforniaAges 18 years+ - NCT05304962RecruitingPhase 1
Test drug RGT-419B for advanced ER+ HER2- breast cancer
This Phase 1 study tests a new drug (RGT-419B), given alone or with hormone (endocrine) therapy, in people with advanced ER-positive, HER2-negative breast cancer that has progressed after standard treatments. It looks mainly at safety and early signs of how well the treatment may work.
Los Angeles, 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
- City of Hope · 3 studies
- University of California, Davis · 3 studies
- Alta Bates Summit Medical Center-Herrick Campus · 2 studies
- Los Angeles Cancer Network · 2 studies
- Stanford Cancer Institute · 2 studies
- UC Irvine Health/Chao Family Comprehensive Cancer Center · 2 studies
- UC San Diego Moores 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 1,320 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.