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 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT05452005RecruitingPhase 1
PET scan with a new tracer for lung cancer brain metastases
This Phase 1 study tests whether a specialized PET scan tracer can “light up” metastatic non-small cell lung cancer in the brain. If you join, you’ll get brain MRI and PET/CT scans and you’ll continue with your planned cancer treatments and follow-up imaging.
Sacramento, CaliforniaAges 18 years+ - NCT05497531Recruiting
Test blood DNA to help guide liver and pancreas biopsies
This pilot study checks whether a special blood test (ctDNA) can detect cancer signals and work as well as another sample method during biopsies for liver, bile duct, or pancreatic cancers. It may help doctors choose the best way to confirm the diagnosis from biopsy samples.
Orange, CaliforniaAges 18 years+ - NCT05691491RecruitingPhase 1/Phase 2
Temozolomide plus M1774 for advanced metastatic cancers
This Phase 1/2 trial tests a combination of temozolomide and M1774 to see how safe it is and whether it can help shrink advanced cancers that have spread. It focuses on certain tumor types and specific biomarker results, and it may be an option if standard treatments have been tried or aren’t possible.
Irvine, CaliforniaAges 18 years+ - NCT05766371RecruitingPhase 2
Pembrolizumab plus PSMA-targeted therapy for advanced prostate cancer
This Phase 2 trial tests whether adding pembrolizumab to a PSMA-targeted drug can better treat metastatic prostate cancer that has progressed despite hormone-blocking treatments. It may help some people by attacking PSMA-positive cancer spots seen on a special PET scan.
San Francisco, CaliforniaAges 18 years+ - NCT05803382RecruitingPhase 1
Adding a new drug to capecitabine for metastatic colorectal cancer
This Phase 1 study tests a new anti-cancer drug (ZEN003694) added to the usual chemotherapy capecitabine. It is for adults with colorectal cancer (and possibly other cancers) that has spread or cannot be removed and has continued despite prior standard treatment.
Irvine, CaliforniaAges 18 years+ - NCT05806515RecruitingPhase 2
Carboplatin before surgery for high-risk BRCA prostate cancer
This trial tests giving the chemotherapy drug carboplatin before surgery to treat people with high-risk prostate cancer and an inherited BRCA1 or BRCA2 gene change. The goal is to shrink or control the cancer before an operation and improve outcomes.
Irvine, CaliforniaAges 18 years+ - NCT05869682RecruitingPhase 2
Bright light therapy for fatigue and depression in prostate cancer
This Phase 2 study tests whether a “bright white light” intervention can reduce cancer-related fatigue and depression in people with advanced prostate cancer receiving hormone-based treatment. If it works, it could improve day-to-day well-being while you’re on standard cancer therapies.
Duarte, CaliforniaAges 60 years+ - NCT05888532RecruitingPhase 1/Phase 2
Testing a copper-based scan and treatment in advanced cancers
This Phase 1/2 trial studies a copper-labeled medicine called 64Cu-GRIP B in people with advanced, metastatic cancers. It may help doctors see where cancer is and how well the drug works, especially alongside immune checkpoint therapy for some cancer types.
San Francisco, CaliforniaAges 18 years+ - NCT05902988RecruitingPhase 1/Phase 2
Study of VLS-1488 for advanced cancers
This early-phase study tests VLS-1488, a new cancer medicine, in people with advanced cancers that have limited treatment options. It may help by finding a safe dose and whether it can shrink or control tumors.
Newport Beach, CaliforniaAges 18 years+ - NCT06173349RecruitingPhase 1
New bladder therapy for BCG-resistant bladder cancer
This trial tests a new treatment for bladder cancer that does not respond to standard BCG therapy. The treatment uses tiny particles (micelles) that deliver a chemotherapy drug directly into the bladder, aiming to destroy cancer cells without needing surgery.
Sacramento, CaliforniaAges 18 years+ - NCT06216249RecruitingPhase 2
Flexible dosing of Lu-PSMA for advanced prostate cancer
This trial tests a flexible dosing schedule of a targeted radiation drug (Lu-PSMA) for men with metastatic prostate cancer that has stopped responding to hormone therapy and chemotherapy. It aims to see if adjusting the treatment schedule can improve outcomes while reducing side effects.
Los Angeles, CaliforniaAges 18 years+ - NCT06228326RecruitingPhase 1/Phase 2
Study of KB707 for advanced cancers affecting the lungs
This trial tests a new medicine called KB707 for people with advanced cancers that affect the lungs. It uses a virus to deliver a gene that may help your immune system fight the tumor. The study is especially looking at people with lung cancer (NSCLC) or other solid tumors that have spread to the lungs and haven't responded to standard treatments.
Redlands, CaliforniaAges 18 years+ - NCT06343402RecruitingPhase 1
Study of BBO-8520 for advanced KRAS G12C lung cancer
This trial tests a new oral medication called BBO-8520 for advanced lung cancer with a specific gene change (KRAS G12C mutation). It aims to see if the drug is safe and effective, and may be combined with another drug (pembrolizumab) in some groups.
Santa Monica, CaliforniaAges 18 years+ - NCT06366490RecruitingPhase 1
Personalized vaccine for recurrent ovarian cancer
This trial tests a personalized cancer vaccine made from your own tumor cells. It is for women with advanced ovarian, fallopian tube, or primary peritoneal cancer that has returned after at least one round of platinum chemotherapy.
Duarte, CaliforniaAges 18 years+ - NCT06444815RecruitingPhase 1
Study of VET3-TGI for advanced solid tumors
This trial tests an experimental treatment called VET3-TGI, which is injected directly into tumors. It is for people with advanced solid tumors who have already tried other treatments and are looking for new options.
Orange, CaliforniaAges 18 years+ - NCT06445738Recruiting
Can some women safely skip radiation after breast cancer surgery?
This trial is for women 50 and older with early-stage, hormone-positive or HER2-positive breast cancer. It tests whether it is safe to skip radiation therapy after a lumpectomy if an MRI before surgery shows the breast tissue looks a certain way.
San Francisco, CaliforniaAges 50 years+ - NCT06470282RecruitingPhase 1/Phase 2
Drug combo plus radiation for muscle-invasive bladder cancer
This trial tests a combination of two drugs (enfortumab vedotin and pembrolizumab) plus radiation therapy for people with bladder cancer that has grown into the muscle layer. The goal is to see if this treatment can kill the cancer while avoiding the need for bladder removal surgery.
San Francisco, CaliforniaAges 18 years+ - NCT06471673RecruitingPhase 1/Phase 2
BRIA-OTS cellular immunotherapy for metastatic breast cancer
This study tests an investigational cellular immunotherapy called BRIA-OTS for people with metastatic breast cancer that has spread and is no longer responding to standard treatments. It aims to help the immune system fight cancer cells.
Santa Monica, CaliforniaAges 18 years+ - NCT05873686RecruitingPhase 1
Study of NXP900 for advanced solid tumors
This trial tests a new drug called NXP900 for people with advanced solid tumors that have not responded to other treatments. The study has two parts: one for any advanced solid tumor and another for tumors with specific genetic changes.
La Jolla, CaliforniaAges 18 years+ - NCT06500455RecruitingPhase 3
Standard vs longer radiation for brain metastases
This trial compares the usual short course of radiation therapy (one session) to a longer course (up to 5 sessions) for people with cancer that has spread to the brain. The goal is to see if the longer course works better and causes fewer side effects.
Anaheim, CaliforniaAges 18 years+ - NCT06515613RecruitingPhase 1
Testing CTIM-76 for recurrent ovarian and other advanced cancers
This trial tests a new drug, CTIM-76, in people whose ovarian, testicular, or endometrial cancer has come back and is not responding to standard treatments. It aims to see if the drug can shrink tumors or stop them from growing.
Beverly Hills, CaliforniaAges 18 years+ - NCT06532006RecruitingPhase 3
HLX22 plus trastuzumab and chemo for HER2+ stomach cancer
This trial tests adding a new drug, HLX22, to the standard combination of trastuzumab and chemotherapy for people with HER2-positive stomach or gastroesophageal junction cancer that hasn't been treated yet. The goal is to see if this three-drug mix works better than the usual two-drug approach.
Anaheim, CaliforniaAges 18 years+ - NCT06538337Recruiting
Shorter radiation therapy for endometrial and cervical cancer
This trial tests a shorter, more targeted type of radiation therapy for people with endometrial or cervical cancer who have had surgery. It aims to reduce side effects by using daily scans to adjust the treatment plan.
Los Angeles, CaliforniaAges 18 years+ - NCT06568692RecruitingPhase 2
Study of PCS6422 with capecitabine for advanced breast cancer
This trial tests a new drug combination (PCS6422 plus capecitabine) for people with advanced or metastatic breast cancer that has not responded to other treatments. The goal is to see if adding PCS6422 can make the chemotherapy work better.
Oxnard, 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.
- University of California, Irvine Medical Center / UC Irvine Health · 5 studies
- University of California, San Francisco · 5 studies
- City of Hope Comprehensive Cancer Center · 4 studies
- UC Irvine Health · 3 studies
- UC San Diego Moores Cancer Center · 3 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 2 studies
- Precision NextGen Oncology and Research Center · 2 studies
- Providence Medical Foundation · 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.