Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,311 recruiting cancer studies with a site in California — including Early Phase 1, Phase 1, Phase 1/Phase 2, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06582017RecruitingPhase 1
Study of QXL138AM for advanced solid tumors and multiple myeloma
This trial tests an investigational drug called QXL138AM for people with advanced solid tumors or multiple myeloma that has not responded to standard treatments. The goal is to see if the drug is safe and effective.
Los Angeles, CaliforniaAges 18 years+ - NCT06633224Recruiting
Fatigue and biology in cancer patients getting chemoradiation
This study looks at why some people feel very tired during cancer treatment. Researchers will collect blood and stool samples to study how the body responds to chemotherapy and radiation.
San Francisco, CaliforniaAges 18 years+ - NCT06342440Recruiting
Early detection of colon cancer and advanced polyps
This study aims to find colorectal cancer and advanced polyps (adenomas) earlier by looking at blood samples. Researchers hope a simple blood test might one day help detect colon cancer before it spreads.
San Diego, CaliforniaAges 18 years+ - NCT06342401Recruiting
Early onset colorectal cancer detection study
This study aims to improve detection of colorectal cancer in people diagnosed before age 50. It compares samples from patients with cancer to those without to find new early detection methods.
Duarte, CaliforniaAges 18–50 - NCT07145255RecruitingPhase 1/Phase 2
Study of MBRC-201 for advanced solid tumors
This trial tests a new drug, MBRC-201, for people with advanced solid tumors that have not responded to standard treatments. The goal is to find the best dose and see if it helps shrink tumors or slow their growth.
San Francisco, CaliforniaAges 18 years+ - NCT07235280RecruitingEarly Phase 1
Testing dapagliflozin before surgery for early stage lung cancer
This trial tests the safety of dapagliflozin (a diabetes drug) taken before surgery for stage IA lung adenocarcinoma. It may help understand if this drug can slow tumor growth while waiting for surgery.
Los Angeles, CaliforniaAges 22 years+ - NCT07250477RecruitingPhase 2
Guided immunotherapy for advanced lung cancer
This trial tests whether using a blood test to guide treatment can improve outcomes for people with advanced non-small cell lung cancer who are starting immunotherapy for the first time. Participants will receive standard immunotherapy tailored to their individual risk profile.
Chico, CaliforniaAges 18 years+ - NCT07524322RecruitingPhase 1
RGT-490 for Advanced Cancers With PIK3CA Mutations
This study tests a new drug called RGT-490 in patients with advanced solid tumors (cancers that have spread or cannot be removed by surgery) that have a specific genetic change called a PIK3CA mutation. The drug is designed to block a protein involved in cancer cell growth.
Los Angeles, CaliforniaAges 18 years+ - NCT05377996RecruitingPhase 1/Phase 2
Study drug for advanced solid tumors with tumor tissue testing
This early-stage study tests emiltatug leda-dotin (Emi-Le) in people with advanced or recurring solid cancers. It aims to see how the drug works and how safely it can be given, using tumor tissue testing to help understand who may benefit.
Santa Monica, CaliforniaAges 18 years+ - NCT07619313RecruitingPhase 1
AB801 with Chemotherapy and Immunotherapy for Bile Duct or Pancreatic Cancer
This study tests a new drug called AB801 combined with standard chemotherapy and immunotherapy for advanced bile duct cancer (cholangiocarcinoma) or pancreatic cancer. The goal is to see if this combination can shrink tumors and help patients live longer.
Los Angeles, CaliforniaAges 18 years+ - NCT07191717RecruitingPhase 2
Imlunestrant and abemaciclib for early ER+ breast cancer
This trial tests whether adding two targeted drugs, imlunestrant and abemaciclib, to your usual hormone therapy can lower the chance of your breast cancer coming back. It is for people with early-stage ER+ breast cancer who have no signs of cancer on scans but have tiny amounts of tumor DNA in their blood (called ctDNA).
Los Angeles, CaliforniaAges 18 years+ - NCT02734537RecruitingPhase 2
Radiation with or without cisplatin after head and neck surgery
This trial studies whether adding cisplatin (a chemotherapy medicine) to radiation therapy helps people with stage III–IVA squamous cell cancer of the head and neck after they’ve had surgery. It’s meant to lower the risk of the cancer coming back.
Arroyo Grande, CaliforniaAges 18 years+ - NCT07085767RecruitingPhase 3
Palazestrant and ribociclib for first-line advanced breast cancer
This trial tests a new drug (palazestrant) combined with ribociclib for people with a common type of advanced breast cancer that is estrogen receptor-positive and HER2-negative. You may qualify if you haven't had treatment for advanced disease and your cancer has either just been found or came back long after completing hormone therapy.
Beverly Hills, CaliforniaAges 18 years+ - NCT07222566RecruitingPhase 3
New drug plus chemotherapy for advanced lung cancer
This trial tests a new study drug called PF-08634404 combined with standard chemotherapy for people with advanced lung cancer that has not been treated before. It aims to see if this combination works better than chemotherapy alone.
Anaheim, CaliforniaAges 18 years+ - NCT07476287RecruitingPhase 2
Study of PF08634404 plus chemo for transformed small cell lung cancer
This trial tests a new study drug (PF08634404) combined with standard chemotherapy for people whose non-small cell lung cancer has changed into a more aggressive form called small cell lung cancer. It hopes to improve outcomes by targeting the cancer in two ways.
Duarte, CaliforniaAges 18 years+ - NCT07125729Recruiting
Early cancer detection test for colorectal cancer
This trial uses two blood tests (Signatera and Haystack) to look for tiny bits of cancer DNA after surgery, to find out if the cancer comes back as early as possible. People with stage II, III, or IV colorectal cancer who have had or will have surgery to remove their tumor may join.
Corona, CaliforniaAges 18 years+ - NCT05595499RecruitingPhase 2
Fisetin for better walking and strength in breast cancer survivors
This study tests whether fisetin (a natural compound) can improve physical function, like walking ability, in breast cancer survivors who feel frail. It may help strengthen muscles and improve daily activity after treatment.
Alhambra, CaliforniaAges Any age - NCT03422198RecruitingPhase 3
Short course vaginal radiation after hysterectomy
This trial tests a short course of targeted vaginal radiation (brachytherapy) after surgery for certain early endometrial cancer. It may help prevent the cancer from coming back in the vaginal area after the uterus has been removed.
Palo Alto, CaliforniaAges Any age - NCT06982521RecruitingPhase 3
Comparing two drug combinations for advanced breast cancer
This trial tests two different combinations of medicines for people with a certain type of advanced breast cancer (HR-positive, HER2-negative) that has a specific gene change called PIK3CA. The goal is to see which combination is better at slowing down the cancer.
Beverly Hills, CaliforniaAges 18 years+ - NCT06589804RecruitingPhase 3
Testing cetuximab plus pembrolizumab for advanced head and neck cancer
This trial tests whether adding cetuximab to the standard drug pembrolizumab works better for head and neck cancer that has spread or come back after treatment. It is for people whose cancer did not respond to platinum chemotherapy and whose tumors have a certain immune marker (PD-L1).
Marysville, CaliforniaAges 18 years+ - NCT07745361RecruitingPhase 2
Study of MRT-2359 with apalutamide for prostate cancer
This trial tests a new oral drug, MRT-2359, combined with apalutamide (a standard hormone therapy) in men with a specific type of prostate cancer that has stopped responding to hormone treatment. The goal is to see if the combination can slow or stop the cancer's growth.
Los Angeles, CaliforniaAges 18 years+ - NCT04267848RecruitingPhase 3
Testing immunotherapy with chemo after lung cancer surgery
This trial tests whether adding an immunotherapy medicine to standard chemotherapy after surgery can improve outcomes for some people with non-small cell lung cancer. It may help by boosting the immune system to reduce the chance the cancer comes back.
Anaheim, CaliforniaAges 18 years+ - NCT06562192RecruitingPhase 1
Testing a radioactive drug for advanced pancreatic, lung, breast, and colorectal cancers
This trial tests a new radioactive drug (177Lu-NNS309) for people with advanced pancreatic, lung, breast, or colorectal cancer that has not responded to prior treatments. It aims to see if the drug can target and shrink tumors.
Los Angeles, CaliforniaAges 18–100 - NCT05372614RecruitingPhase 1
Testing trastuzumab deruxtecan and neratinib for HER2-positive cancers
This trial tests a combination of two targeted drugs, trastuzumab deruxtecan (Enhertu) and neratinib, for people with solid tumors that have a HER2 gene change. The goal is to see if the combination is safe and works well for cancers that have not responded to at least one prior treatment.
Duarte, 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 Comprehensive Cancer Center · 7 studies
- City of Hope · 4 studies
- UCLA / Jonsson Comprehensive Cancer Center · 4 studies
- University of California Davis Comprehensive Cancer Center · 4 studies
- University of California, San Francisco · 4 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 3 studies
- Fremont - Rideout Cancer Center · 3 studies
- University of California, Irvine Medical Center / UC Irvine Health · 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 1,311 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.