Various adjustments were made over succeeding years.
A network of roads through the park was built soon after, allowing the construction of picnic areas and hiking trails as well as making the forests more accessible to visitors.
A stone memorial was placed at Indian Field in 1906, with a plaque misspelling the name of the Indian chief, Abraham Ninham, as "Abraham Nimham."
One particular concern was the threat of the wetlands serving as breeding grounds for malaria-borne mosquitoes, which had drawn the ire of local residents and property owners as they believed the wetlands to be "unsightly and unsanitary."
The marshlands were filled in between 1906 and 1922.
The marsh to the southwest of the Van Cortlandt Station was converted to a lake.
An "outlet sewer" under Broadway was built in 1907.
From 1903 to 1911, NYC Parks cleaned the 13-foot-deep (4.0 m) Van Cortlandt Lake, removed the original earthen dam, and emptied the lake in order to dredge the lake bed to a lower depth.
A new dam was installed to reform the lake.
The former marshland was filled in.

During a 1910s excavation for a sewer pipe, stones were unearthed that were suspected to be from the old van der Donck estate.
During World War I, the Parade Ground was used to train soldiers.
Eight tennis courts opened in 1914 with admission being $1 per person, and owing to the Van Cortlandt Golf Course's immense popularity, the Mosholu Links also opened that year.
By 1917, the Parade Ground contained 10 out of the park's baseball diamonds.
The park's recreational facilities were quite popular, with more than 10,000 people using them on a busy day.
However, during and following World War I, the Parade Ground was used for war training.
Until 1926, the baseball fields did not contain backstops, and had to be vacated by July 4 of every year, so the National Guard could use the field.

The 6.2-mile (10.0 km) cross-country running course was inaugurated in 1914.
The track started out as a flat path, became hilly, turned onto a "little spell of road work," went into the forest, and crossed a water before turning back.
A year later, it hosted the Metropolitan Association of the Amateur Athletic Union's Junior and Senior Cross Country championships.
A modified 3.1-mile (5.0 km) cross-country course opened on November 5, 1921, with runners simply changing direction at the city border.
The new course, which started at the original polo fields, did not conflict with either of the golf courses.

In 1922, there was a proposal to acquire land for the future Saw Mill River Parkway, which would connect the park to 424 acres (172 ha) of open space in Westchester when completed.
Through the 1930s, the New York City Department of Parks and Recreation kept adding new recreational facilities in the park.
The Colonial and Shakespeare Gardens had a combined 250,000 flowers by 1931, but both were demolished by the end of the decade due to bad drainage.

In 1934, Robert Moses became the New York City Parks Commissioner, and during his 16-year tenure as commissioner, altered almost every aspect of the park.
His job partially entailed balancing the needs of area residents, whose numbers had grown in the past decade, with transit users who traveled to the park from the north and south.
Moses's development plans in the 1930s called for the construction of the Henry Hudson Parkway and Mosholu Parkway to bisect Van Cortlandt Park and meet at a trumpet interchange about half a mile north of the center, merging into the Saw Mill River Parkway.
Due to objections over the construction of roads inside the park, the width of the parkways' lanes was reduced.
Tibbetts Brook was dredged and landscaped in 1938 to accommodate construction.
Such construction continued until 1955, during which the Major Deegan Expressway (current Interstate 87) was also built, bisecting the Mosholu Parkway.
This conflicted with Moses's plans for the park as a "rural oasis", as highway construction ultimately separated the park into six pieces and demolished most of the remaining marsh in the park.
This construction also induced siltat
Various adjustments were made over succeeding years. A network of roads through the park was built soon after, allowing the construction of picnic areas and hiking trails as well as making the forests more accessible to visitors. A stone memorial was placed at Indian Field in 1906, with a plaque misspelling the name of the Indian chief, Abraham Ninham, as "Abraham Nimham." One particular concern was the threat of the wetlands serving as breeding grounds for malaria-borne mosquitoes, which had drawn the ire of local residents and property owners as they believed the wetlands to be "unsightly and unsanitary." The marshlands were filled in between 1906 and 1922. The marsh to the southwest of the Van Cortlandt Station was converted to a lake. An "outlet sewer" under Broadway was built in 1907. From 1903 to 1911, NYC Parks cleaned the 13-foot-deep (4.0 m) Van Cortlandt Lake, removed the original earthen dam, and emptied the lake in order to dredge the lake bed to a lower depth. A new dam was installed to reform the lake. The former marshland was filled in.
During a 1910s excavation for a sewer pipe, stones were unearthed that were suspected to be from the old van der Donck estate. During World War I, the Parade Ground was used to train soldiers. Eight tennis courts opened in 1914 with admission being $1 per person, and owing to the Van Cortlandt Golf Course's immense popularity, the Mosholu Links also opened that year. By 1917, the Parade Ground contained 10 out of the park's baseball diamonds. The park's recreational facilities were quite popular, with more than 10,000 people using them on a busy day. However, during and following World War I, the Parade Ground was used for war training. Until 1926, the baseball fields did not contain backstops, and had to be vacated by July 4 of every year, so the National Guard could use the field.
The 6.2-mile (10.0 km) cross-country running course was inaugurated in 1914. The track started out as a flat path, became hilly, turned onto a "little spell of road work," went into the forest, and crossed a water before turning back. A year later, it hosted the Metropolitan Association of the Amateur Athletic Union's Junior and Senior Cross Country championships. A modified 3.1-mile (5.0 km) cross-country course opened on November 5, 1921, with runners simply changing direction at the city border. The new course, which started at the original polo fields, did not conflict with either of the golf courses.
In 1922, there was a proposal to acquire land for the future Saw Mill River Parkway, which would connect the park to 424 acres (172 ha) of open space in Westchester when completed. Through the 1930s, the New York City Department of Parks and Recreation kept adding new recreational facilities in the park. The Colonial and Shakespeare Gardens had a combined 250,000 flowers by 1931, but both were demolished by the end of the decade due to bad drainage.
In 1934, Robert Moses became the New York City Parks Commissioner, and during his 16-year tenure as commissioner, altered almost every aspect of the park. His job partially entailed balancing the needs of area residents, whose numbers had grown in the past decade, with transit users who traveled to the park from the north and south. Moses's development plans in the 1930s called for the construction of the Henry Hudson Parkway and Mosholu Parkway to bisect Van Cortlandt Park and meet at a trumpet interchange about half a mile north of the center, merging into the Saw Mill River Parkway. Due to objections over the construction of roads inside the park, the width of the parkways' lanes was reduced. Tibbetts Brook was dredged and landscaped in 1938 to accommodate construction. Such construction continued until 1955, during which the Major Deegan Expressway (current Interstate 87) was also built, bisecting the Mosholu Parkway. This conflicted with Moses's plans for the park as a "rural oasis", as highway construction ultimately separated the park into six pieces and demolished most of the remaining marsh in the park. This construction also induced siltat
Van Cortlandt Park