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ClinicalTrials.gov 1,650 recruiting now official registry

Clinical trials in Colorado

Every US clinical trial with a study site in Colorado - recruiting status, phase mix, and the conditions and sponsors driving research in the state, from the NIH ClinicalTrials.gov registry.

Colorado has 5,273 registered US clinical trials with a study site in-state, 1,650 of them currently recruiting (above the 14% national average by 17 percentage points). 1,536 of these trials are in Phase 3 (late-stage) and 1,205 in Phase 2. The most frequently studied condition in Colorado is HIV Infections, with 107 linked trials.

The state picture

Colorado has 5,273 registered clinical trials with sites in-state, 1,650 of them open to new participants right now, about 31% of the state's indexed portfolio.

1,650
recruiting participants now
31%
of in-state trials open to enrollment
1,536
in Phase 3 (late-stage)
107
top condition: HIV Infections

Counts include every study with at least one recorded site in the state, from the public ClinicalTrials.gov registry. Reference information, not medical advice.

Phase 31536Phase 21205NA884Phase 1726Phase 4215Early Phase 122
Completed2339Recruiting1650Active1284
Treemap Treemap of 15 categories, sized proportional to value. HIV Infections - 107 HIV Infections 107 Breast Cancer - 99 Breast Cancer 99 Asthma - 81 Asthma 81 Non-Small Cell Lung Cancer - 81 Non-Small Cell L… 81 Obesity - 57 Obesity 57 Multiple Myeloma - 56 Multiple My… 56 Cystic Fibrosis - 55 Cystic Fibrosis 55 Prostate Cancer - 55 Prostate Cancer 55 Colorectal Cancer - 46 Colorectal C… 46 Multiple Sclerosis - 44 Multiple Scl… 44 Diabetes Mellitus, Type 2 - 41 Diabetes Mell… 41 Lung Cancer - 39 Lung Cancer 39 Heart Failure - 38 Heart Failure 38 Ovarian Cancer - 38 Ovarian Cancer 38 Parkinson Disease - 35 Parkinson Disease 35

By Status

StatusTrial count
Completed 2,339
Recruiting 1,650
Active 1,284

By Phase

PhaseTrial count
Phase 3 1,536
Phase 2 1,205
NA 884
Phase 1 726
Phase 4 215
Early Phase 1 22

Reading the Clinical Trial Landscape in Colorado

ClinicalTrials.gov lists 5,273 clinical trials with study locations in Colorado. Of those, 1,650 are currently recruiting, roughly 31% of the state's indexed portfolio, above the 14% national average by 17 percentage points, which is a rough but useful proxy for how much research activity is presently open to new participants relative to the rest of the country. The largest status group for Colorado is "Completed" with 2,339 entries, which sets the overall tone of the registry footprint in this geography. These counts are drawn from the public registry maintained by the National Library of Medicine and are reflected here exactly as indexed; they include every study with at least one site recorded in Colorado, regardless of sponsor type.

The phase distribution shown above breaks the same trials down by where they sit along the investigational pathway. For Colorado, Phase 3 accounts for 1,536 indexed trials and Phase 2 accounts for 1,205. Phase 2 studies typically evaluate early efficacy and refine dosing, while Phase 3 studies run larger and are usually closer to regulatory submission, so a state with a strong Phase 3 count often reflects established research centers working on late-stage programs, while a heavier Phase 1 and Phase 2 weighting can indicate concentrations of academic medical centers and early-stage investigator networks. Phase markers come directly from the sponsor-reported registry field and are not transformed on this site.

The most frequently indexed condition for Colorado is HIV Infections with 107 linked trials, across 15 top condition areas surfaced above. On the sponsor side, University of Colorado, Denver leads with 525 studies tied to Colorado, with 9 additional organizations in the visible top list. Together, these breakdowns give a quick sense of which conditions and organizations drive trial activity in Colorado, but they do not describe treatment availability, local clinic capacity, or the chance of being matched to any specific study. All numbers come from ClinicalTrials.gov and should be used for reference only, verify current status and eligibility directly on ClinicalTrials.gov, and always discuss clinical trial participation with a qualified healthcare provider before making any decision.

What this means if you're in Colorado

1,650 trials in Colorado are open to new participants, here's how to act on that.

A trial is counted here when it lists at least one in-state site; always confirm eligibility and current status on ClinicalTrials.gov.

States With a Similar Recruiting Share

The closest states nationwide to Colorado's 31% of trials currently recruiting.

Source: ClinicalTrials.gov, the US trial registry maintained by the National Library of Medicine, part of the NIH. See our methodology for how this data is sourced and computed.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered clinical trial within this state, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.