Chulsoon Choi

Bib: 974•M•Age: 49

Chantilly, VA

Masters

0:00

0:00

/ mi

Masters

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Overall

#0 / 2429

Top 20%

Gender (Male)

#0 / 1480

Top 26%

Masters (Masters Men)

#0 / 477

Top 21%

Division (M45-49)

#0 / 106

Top 14%

Race Day Weather

55°/45°F

few clouds

⏱️ Race Timeline

Start

0:00:00

Race begins

Start

0:00:00

Race begins

5K· 3.11 mi

26:52

Rank: #765

Start → 5K

26:52 | 8:39/mi

5K· 3.11 mi

26:52

Rank: #765

Start → 5K

26:52 | 8:39/mi

10K· 6.21 mi

51:49

Rank: #632 (+133)

5K → 10K

24:57 | 8:02/mi

10K· 6.21 mi

51:49

Rank: #632 (+133)

5K → 10K

24:57 | 8:02/mi

15K· 9.32 mi

1:17:09

Rank: #605 (+27)

10K → 15K

25:20 | 8:09/mi

15K· 9.32 mi

1:17:09

Rank: #605 (+27)

10K → 15K

25:20 | 8:09/mi

20K· 12.43 mi

1:43:21

Rank: #602 (+3)

15K → 20K

26:12 | 8:26/mi

20K· 12.43 mi

1:43:21

Rank: #602 (+3)

15K → 20K

26:12 | 8:26/mi

Half· 13.10 mi

1:49:02

Rank: #593 (+9)

20K → Half

5:41 | 8:28/mi

Half· 13.10 mi

1:49:02

Rank: #593 (+9)

20K → Half

5:41 | 8:28/mi

30K· 18.64 mi

2:36:11

Rank: #551 (+42)

Half → 30K

47:09 | 8:30/mi

30K· 18.64 mi

2:36:11

Rank: #551 (+42)

Half → 30K

47:09 | 8:30/mi

35K· 21.75 mi

3:05:47

Rank: #504 (+47)

30K → 35K

29:36 | 9:32/mi

35K· 21.75 mi

3:05:47

Rank: #504 (+47)

30K → 35K

29:36 | 9:32/mi

25.2M

3:38:45

Rank: #485 (+19)

35K → 25.2M

32:58 | 9:33/mi

25.2M

3:38:45

Rank: #485 (+19)

35K → 25.2M

32:58 | 9:33/mi

Finish· 26.22 mi

3:47:28

Rank: #478 (+7)

25.2M → Finish

8:43 | 8:33/mi

Finish· 26.22 mi

3:47:28

Rank: #478 (+7)

25.2M → Finish

8:43 | 8:33/mi

The Course

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Half Splits

1st Half· via HalfFaster

Distance13.10 mi

Time1:49:02

Pace8:19 /mi

2nd Half

Distance13.12 mi

Time1:58:26

Pace9:02 /mi

📊Positive Split: 8.6% slower second half

Checkpoint Splits

Checkpoint	Distance	Time of Day	Time	Avg Pace	Segment Time	Segment Pace	Diff
5K	3.11 mi	08:01:14	26:52	8:39	26:52	8:39	-
10K	6.21 mi	08:26:11	51:49	8:20	24:57	8:02	-0:37
15K	9.32 mi	08:51:31	1:17:09	8:17	25:20	8:09	+0:07
20K	12.43 mi	09:17:43	1:43:21	8:19	26:12	8:26	+0:17
Half	13.10 mi	09:23:24	1:49:02	8:19	5:41	8:28	+0:02
30K	18.64 mi	10:10:33	2:36:11	8:23	47:09	8:30	+0:02
35K	21.75 mi	10:40:09	3:05:47	8:33	29:36	9:32	+1:02
25.2M	25.20 mi	11:13:07	3:38:45	8:41	32:58	9:33	+0:01
Finish	26.22 mi	11:21:50	3:47:28	8:41	8:43	8:33	-1:00

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:02 /mi

Average Pace

8:41 /mi

Slowest Pace

9:33 /mi

Loading chart...

Fastest

Middle

Slowest

Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:54

72% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

1:02:34

28% of race

Average Pace: 8:41 /mi

Loading chart...

Faster pace (< avg)

Steady pace (≈ avg)

Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

0mi6.6mi13.1mi19.7mi26.2mi

Pace:

Faster

Steady

Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

Checkpoint	Distance	Time of Day	Time	Avg Pace	Segment	Pace	Rank
5K	3.11 mi	08:01:14	26:52	8:39	26:52	8:39	#765
10K	6.21 mi	08:26:11	51:49	8:20	24:57	8:02	#632
15K	9.32 mi	08:51:31	1:17:09	8:17	25:20	8:09	#605
20K	12.43 mi	09:17:43	1:43:21	8:19	26:12	8:26	#602
Half	13.10 mi	09:23:24	1:49:02	8:19	5:41	8:28	#593
30K	18.64 mi	10:10:33	2:36:11	8:23	47:09	8:30	#551
35K	21.75 mi	10:40:09	3:05:47	8:33	29:36	9:32	#504
25.2M	25.20 mi	11:13:07	3:38:45	8:41	32:58	9:33	#485
Finish	26.22 mi	11:21:50	3:47:28	8:41	8:43	8:33	#478

Faster pace

Steady pace

Slower pace

Checkpoint and Segment Rankings

Checkpoint	Distance	Seg. Dist	Overall	Males	M45-49	Seg. Overall	Seg. Males	Seg. M45-49
5K	3.11 mi	3.11 mi	765	604	28	580(Top 24%)	478(Top 32%)	18(Top 17%)
10K	6.21 mi	3.10 mi	632+133	513+91	20+8	539(Top 22%)	445(Top 30%)	16(Top 15%)
15K	9.32 mi	3.11 mi	605+27	495+18	16+4	580(Top 24%)	478(Top 32%)	18(Top 17%)
20K	12.43 mi	3.11 mi	602+3	492+3	17-1	614(Top 25%)	494(Top 33%)	18(Top 17%)
Half	13.10 mi	0.67 mi	593+9	485+7	17	599(Top 25%)	485(Top 33%)	16(Top 15%)
30K	18.64 mi	5.54 mi	551+42	445+40	17	569(Top 23%)	456(Top 31%)	19(Top 18%)
35K	21.75 mi	3.11 mi	504+47	405+40	16+1	443(Top 18%)	350(Top 24%)	15(Top 14%)
25.2M	25.20 mi	3.45 mi	485+19	386+19	15+1	499(Top 21%)	361(Top 24%)	19(Top 18%)
Finish	26.22 mi	1.02 mi	478+7	381+5	15	454(Top 19%)	339(Top 23%)	13(Top 12%)

M45-49

Passing Analysis

Category:

Athletes Passed

347*

Passed By

Net Change

+287

Segment	Athletes Passed	Passed By	Net Change	Start Rank	End Rank
Start → 5K	-	-	-	-	#765
5K → 10K	135	2	+133	#765	#632
10K → 15K	31	4	+27	#632	#605
15K → 20K	15*	12	+3	#605	#602
20K → Half	12*	3	+9	#602	#593
Half → 30K	59*	17	+42	#593	#551
30K → 35K	51*	4	+47	#551	#504
35K → 25.2M	35*	16	+19	#504	#485
25.2M → Finish	9*	2	+7	#485	#478
TOTALS	347*	60	+287

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:

🔥Passing Intensity

🔄Passing Circle

🌊Position Flow

🏃Race Lanes

🏆 Finisher Certificate

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March 22, 2026

Chulsoon Choi

Has completed the Marathon in a time of:

3:47:28

477

out of 2429

Overall Place

380

out of 1480

Gender (Male)

out of 106

Age Group (M45-49)

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Results processed 14 days ago

Public Race Data

Enhanced athlete results built from publicly available data.

Race managed by

J & A Racing

Race timed by

Big River Race Management

Chulsoon Choi

⏱️ Race Timeline

The Course

Claim it — unlock a deeper AI report on this race, free

Half Splits

Checkpoint Splits

Checkpoints & Pacing

📈Pace Line

Pace Progression

📊Segments

Segment Time Comparison

🎨Heatmap

Pace Heatmap

✨Sparklines

Checkpoint Splits with Pace Trends

Checkpoint and Segment Rankings

Segment Performance Analysis

10K→15K

5K→10K

10K→15K

15K→20K

20K→Half

Half→30K

30K→35K

35K→25.2M

25.2M→Finish

Passing Analysis

Passing Visuals

🔥Passing Intensity

🔄Passing Circle

🌊Position Flow

🏃Race Lanes

Age Grade

Export Track Data

Questions or issues regarding timing data?

Quick Links

All Results

Race Analytics

Course Information

Contact Time Management

Public Race Data