DENVER – Hundreds of thousands of people are gathering in Civic Center Park in downtown Denver for the Women’s March on Denver Saturday.

RELATED | Hundreds expected at Women's March on Denver: What you need to know

MORE | RTD will deploy extra buses, light rail during Women's March

Denver7 reporter Amanda del Castillo was at Civic Center Park early Saturday as crowds started to walk to downtown in preparation for the march.

8:10 a.m. - While the march was scheduled to begin at 9:30 a.m., dozens of people were already at Civic Center a little past 8 a.m.

The picture in my last tweet taken just 30 minutes ago. Look how the crowd at Civic Center Park is growing. #Denver7 #WomensMarch pic.twitter.com/vstaLT8z35 — Amanda del Castillo (@AmandaDTV) January 21, 2017

11:25 a.m. - Denver7's Amanda del Castillo spots several signs at Women's March Denver.

Viewers who called into the Denver7 newsroom said crowds were big enough to take up four blocks before anyone could reach Civic Center Park.

The hundreds of thousands of people gathered at Civic Center Park caused communication issues. Denver7's Amanda del Castillo said many, including the Denver7 field crew, were unable to complete calls, send texts, or post to social media.

While nearly 100,000 people participated in the march through downtown Denver, hundreds of others stayed behind at Civic Center Park and even lined steps at the State Capitol.

GALLERY | Thousands march in downtown Denver for Women's March

11:42 a.m. - Approximately 200,000 people are currently in downtown Denver for the Women's March, according to Boulder Daily Camera reporter John Bear, who cites an organizer speaking at the event.

Organizer on stage said 200k people are at #WomensMarchDenver. — John Bear (@johnbearwithme) January 21, 2017

11:50 a.m. - Denver Police tweets officials "are unable to provide accurate crowd numbers" from the Women's March at Civic Center Park.

#DPD: We are unable to provide accurate crowd numbers. For march details, please contact event organizers at https://t.co/gDGeCcZs17 — Denver Police Dept. (@DenverPolice) January 21, 2017

12:03 p.m. - There are approximately 100,000 participants at Women's March on Denver, according to Lisa Cutter, a March on Colorado spokesperson. The number could swell up to 200,000 by the afternoon.

12:17 p.m. - So far, three people have been arrested: One person had an active warrant, another was arrested for an assault to a police officer and a third was in possession of an illegal weapon, according to a spokesperson from the Denver Police Department.

The Women's March Denver is expected to go through the rest of the morning into late Saturday afternoon.

Watch the crowds march in Denver as seen from AIRTRACKER7 below:

--------- Sign up for Denver7 email alerts to stay informed about breaking news and daily headlines.

Or, keep up-to-date on the latest news and weather with the Denver7 apps for iPhone/iPads, Android and Kindle.