Fall-O-Ween at Heritage Hill Historical Park runs six nights this October. Four of them have nothing else on the calendar. On the other two, Saturday the 17th and Saturday the 24th, a City of Lake Forest event overlaps Heritage Hill's evening hours. For anyone in Teresina, the community at the north end of Peachwood that the City approved for up to 85 homes, planning the month mostly means choosing which Saturday to double up.
This is the 2026 calendar as published by Patch Lake Forest on October 2, the Orange County Register on October 5, OC Parks and the City's own calendar.
| Date | Event | Hours | Where | Cost |
|---|---|---|---|---|
| Sat., Oct. 10 | Monster Mash Special Needs Halloween Dance | 6 to 8 p.m. | Lake Forest Clubhouse | Free |
| Sat., Oct. 10 | Limestone Canyon "Hike to Both Sides of the Sinks" | See OC Parks | 13333 Black Star Canyon Road, Silverado | See OC Parks |
| Fri. to Sun., Oct. 16 to 18 | Fall-O-Ween | 4:30 to 8:30 p.m. | Heritage Hill, 25151 Serrano Road | Free entry and parking |
| Sat., Oct. 17 | Night of the Living Shred | 7 to 10 p.m. | Etnies Skatepark of Lake Forest | Free, per Patch |
| Fri. to Sun., Oct. 23 to 25 | Fall-O-Ween | 4:30 to 8:30 p.m. | Heritage Hill, 25151 Serrano Road | Free entry and parking |
| Sat., Oct. 24 | Spooktakular | 2 to 6 p.m. | Lake Forest Sports Park, 28000 Rancho Parkway | $10 resident wristband |
This Saturday Is the Warm-Up
Saturday, October 10, comes before Heritage Hill opens for the season and has a quieter lineup of its own.
The Monster Mash Special Needs Halloween Dance runs from 6 to 8 p.m. at the Lake Forest Clubhouse. Patch describes it as a free annual event for people of all accessibility levels. The evening includes DJ Noah's "World-Famous Dance Floor," a full costume photo booth, a reptile petting booth, face painting, free pizza and refreshments, and craft tables. Costumes are encouraged.
For something outdoors, OC Parks lists a "Limestone Canyon – Weekend Hike to Both Sides of the Sinks" the same day. The meeting address is 13333 Black Star Canyon Road in Silverado, not a Lake Forest trailhead, so check the details on the OC Parks Irvine Ranch Open Space page before you go.
Heritage Hill Closes Early So It Can Reopen After Dark
All six Fall-O-Ween nights are at Heritage Hill Historical Park on Serrano Road. The OC Register lists 2026 as the event's sixth year.
The setting is what makes this event different from a pop-up maze in a parking lot. OC Parks maintains four restored buildings on the property:
- Serrano Adobe, built around 1863
- El Toro Grammar School, 1890
- St. George's Episcopal Mission, 1891
- Harvey Bennett Ranch House, 1908
Taken together, the four buildings cover roughly 45 years of local history. Teresina sits on land the City first approved for development in 2012, with amended plans approved in 2018, and the City still lists it as under construction. That puts the oldest and newest parts of this side of Lake Forest on the same October calendar.
Per the 2026 OC Parks event page, the grounds are decorated and include Halloween and fall photo spots, a straw maze and a scavenger hunt with prizes while supplies last. Light refreshments are sold on site, and leashed pets are welcome. The flyer lists both admission and parking as free. Neither the flyer nor the event page mentions reservations or timed entry.
Heritage Hill will close at 2 p.m. on Friday, October 16, and Saturday, October 17, then reopen for the evening event. If you planned a daytime visit to the historic buildings on either day, move it to another day.
OC Parks' 2025 announcement listed the same three activities: photo spots, the scavenger hunt and the straw maze. The 2026 materials don't name a new feature, so a family that went last year can expect a familiar format.
October 17: Straw Maze First, Skatepark After
The first double-header falls on a Saturday that runs late. Fall-O-Ween is open from 4:30 to 8:30 p.m., and Night of the Living Shred starts at 7 p.m. at Etnies Skatepark of Lake Forest and runs until 10. The two events overlap for 90 minutes. If you start at Heritage Hill when it opens, you have time to walk the grounds before heading to the skatepark.
Patch describes the skatepark event as:
"a night packed with Halloween-themed skateboarding events, including an obstacle course infested with frightening ghouls, costume contest, 'secret obstacle' and more."
Patch lists the event as free and says attendees were urged to bring a helmet. The skatepark's standing rules still apply on event nights. The City requires a completed waiver and membership form on file for everyone who enters, and riders under 8 must have a guardian at the park the whole time. Completing the waiver before Saturday saves time at the gate.
October 24: The Afternoon Runs on a Wristband
The second Saturday starts earlier, and this is the only event on the calendar that costs money. The City's Halloween event at Lake Forest Sports Park, 28000 Rancho Parkway, runs from 2 to 6 p.m. Patch says it includes games, food trucks and entertainment. The City calendar spells it "Spooktakular," while Patch spells it "Spooktacular." It's the same event either way.
Patch reports that Lake Forest residents can buy wristbands at the Sports Park for $10, with sales that began September 1. Neither Patch nor the City calendar lists non-resident pricing or exactly what the wristband covers, so the Sports Park front desk is the place to ask.
The afternoon schedule leaves room for both events:
- 2 p.m. Spooktakular opens at the Sports Park.
- 4:30 p.m. Fall-O-Ween opens on Serrano Road while the Sports Park event is still running.
- 6 p.m. Spooktakular ends, and Heritage Hill stays open until 8:30.
With Heritage Hill open two and a half hours after the Sports Park closes, families with young children can do the games and food trucks in daylight and walk the straw maze after dark. That covers both of the month's big free-to-cheap events in one afternoon, without a late night like the 17th.
If one Saturday is enough, the remaining Fall-O-Ween nights cover it. On Friday the 16th, Sunday the 18th, Friday the 23rd and Sunday the 25th, Heritage Hill has the evening to itself.
Every Trip Starts at the Same Intersection
Teresina is accessed only from Peachwood, and the City's municipal code lists Peachwood and Trabuco Road as an intersection. Getting to the Sports Park or Serrano Road usually means passing Bake Parkway and Trabuco Road, which is still under construction.
The City's Currently Underway projects page lists the Bake Parkway and Trabuco/Irvine Boulevard Intersection Improvements with an expected completion of "Late 2026." The work widens the westbound approach on Bake Parkway, rebuilds the median, and adds a second left-turn lane in each direction on Bake. It also changes the dedicated right-turn lane on northbound Trabuco Road to a through/right lane. The City describes the goal as reducing peak-hour congestion and improving safety.
The project is funded through the Lake Forest Traffic Mitigation Program. Under the municipal code, this program collects fees from development applicants to pay for traffic improvements tied to new communities. The code estimates the cost of the Bake and Irvine/Trabuco improvement at $1,072,000. That figure is a planning estimate, not a contract amount.
The most recent update we found is the City's May 20, 2026 notice. It scheduled daytime paving on Bake Parkway between Cromwell and Trabuco Road for May 23, followed by night grinding and paving from 9 p.m. to 6 a.m. during the week of May 26. During the night work, the intersection signals were set to red flash. We haven't found a published fall work schedule. If more night work is announced in October, check before driving to an evening event.
If you're out on a Saturday afternoon this month, In-N-Out opened September 4 at 7900 Great Park Blvd. in Irvine. Patch reports it's part of the first phase of the Canopy shopping center.
At The Harter Group, we track Teresina street by street, from the roadwork at Trabuco to how its homes are trading this fall. If you'd like to know where your home stands before the holidays, Request Your Free Home Valuation and our broker-owner team will put it together for you.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
