Boston Marathon logo
BOSTON MARATHON 2025

Ernest Chan

Bib: 5581•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 21%
Gender (Male)
#0 / 16105
Top 33%
Masters (Masters Men)
#0 / 10463
Top 19%
Division (M40-44)
#0 / 2247
Top 44%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:23/mi
19:50
↑ 97↓ 3451.5%
10K· 6.21 mi
6:28/mi
39:55
↑ 79↓ 1380.4%
15K· 9.32 mi
6:38/mi
1:00:31
↑ 67↓ 78
20K· 12.43 mi
6:44/mi
1:21:25
↑ 106↓ 860.1%
Half· 13.11 mi
6:40/mi
1:25:58
↑ 19↓ 370.5%
25K· 15.53 mi
7:05/mi
1:43:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:16/mi
2:05:43
↑ 181↓ 1480.2%
20M
7:20/mi
2:15:41
↑ 64↓ 500.2%
21M
7:53/mi
2:23:34
↑ 106↓ 241.6%
35K· 21.75 mi
7:14/mi
2:28:59
↑ 17↓ 861.7%
23M
8:19/mi
2:39:24
↑ 23↓ 630.6%
24M
8:21/mi
2:47:45
↓ 821.3%
40K· 24.85 mi
8:36/mi
2:55:06
↓ 200.3%
25.2M
8:19/mi
2:57:58
↑ 13↓ 160.2%
Finish· 26.22 mi
7:52/mi
3:05:59
↑ 22↓ 21

The Course

Is this your race?

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

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:58
Pace6:33 /mi
2nd Half
Distance13.11 mi
Time1:40:01
Pace7:38 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:0119:506:2319:50
6:23
-
10K
6.21 mi10:43:0639:556:2520:05
6:28
+0:05
15K
9.32 mi11:03:421:00:316:3020:36
6:38
+0:10
20K
12.43 mi11:24:361:21:256:3320:54
6:44
+0:06
Half
13.11 mi11:29:091:25:586:334:33
6:40
-0:04
25K
15.53 mi11:46:201:43:096:3817:11
7:05
+0:25
30K
18.64 mi12:08:542:05:436:4522:34
7:16
+0:11
20M
20.00 mi12:18:522:15:416:479:58
7:20
+0:04
21M
21.00 mi12:26:452:23:346:507:53
7:53
+0:33
35K
21.75 mi12:32:102:28:596:515:25
7:14
-0:39
23M
23.00 mi12:42:352:39:246:5610:25
8:19
+1:05
24M
24.00 mi12:50:562:47:456:598:21
8:21
+0:02
40K
24.85 mi12:58:172:55:067:037:21
8:36
+0:15
25.2M
25.20 mi13:01:092:57:587:042:52
8:19
-0:17
Finish
26.22 mi13:09:103:05:597:068:01
7:52
-0:27

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

6:23 /mi

Average Pace

7:06 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:58

46% of race

Time at Steady Pace

55:08

30% of race

Time at Slower Pace

44:53

24% of race

Average Pace: 7:06 /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.

Loading...
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

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:23:0119:506:2319:50
6:23
#3001
10K
6.21 mi10:43:0639:556:2520:05
6:28
#3224
15K
9.32 mi11:03:421:00:316:3020:36
6:38
#3643
20K
12.43 mi11:24:361:21:256:3320:54
6:44
#3834
Half
13.11 mi11:29:091:25:586:334:33
6:40
#3868
25K
15.53 mi11:46:201:43:096:3817:11
7:05
#4295
30K
18.64 mi12:08:542:05:436:4522:34
7:16
#4688
20M
20.00 mi12:18:522:15:416:479:58
7:20
#4810
21M
21.00 mi12:26:452:23:346:507:53
7:53
#4912
35K
21.75 mi12:32:102:28:596:515:25
7:14
#4974
23M
23.00 mi12:42:352:39:246:5610:25
8:19
#5389
24M
24.00 mi12:50:562:47:456:598:21
8:21
#5629
40K
24.85 mi12:58:172:55:067:037:21
8:36
#5858
25.2M
25.20 mi13:01:092:57:587:042:52
8:19
#5853
Finish
26.22 mi13:09:103:05:597:068:01
7:52
#5975
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3001285428544500(Top 16%)4217(Top 26%)4217(Top 188%)
10K6.21 mi3.10 mi3224-2233064-2103064-2103472(Top 12%)3291(Top 20%)3291(Top 146%)
15K9.32 mi3.11 mi3643-4193446-3823446-3824500(Top 16%)4217(Top 26%)4217(Top 188%)
20K12.43 mi3.11 mi3834-1913614-1683614-1684672(Top 16%)4334(Top 27%)4334(Top 193%)
Half13.11 mi0.68 mi3868-343645-313645-315002(Top 18%)4631(Top 29%)4631(Top 206%)
25K15.53 mi2.42 mi4295-4274029-3844029-3846874(Top 24%)6025(Top 37%)6025(Top 268%)
30K18.64 mi3.11 mi4688-3934353-3244353-3246238(Top 22%)5475(Top 34%)5475(Top 244%)
20M20.00 mi1.36 mi4810-1224454-1014454-1015973(Top 21%)5175(Top 32%)5175(Top 230%)
21M21.00 mi1.00 mi4912-1024527-734527-736654(Top 23%)5465(Top 34%)5465(Top 243%)
35K21.75 mi0.75 mi4974-624571-444571-446820(Top 24%)5579(Top 35%)5579(Top 248%)
23M23.00 mi1.25 mi5389-4154908-3374908-33712124(Top 43%)8281(Top 51%)8281(Top 369%)
24M24.00 mi1.00 mi5629-2405078-1705078-17013530(Top 48%)8902(Top 55%)8902(Top 396%)
40K24.85 mi0.85 mi5858-2295239-1615239-16113989(Top 49%)8981(Top 56%)8981(Top 400%)
25.2M25.20 mi0.35 mi5853+55229+105229+107618(Top 27%)5677(Top 35%)5677(Top 253%)
Finish26.22 mi1.02 mi5975-1225301-725301-7211885(Top 42%)7966(Top 49%)7966(Top 355%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21story building
+97ft-345ft

Overall

4500

Males

4217

M40-44

4217

5K→10K

3.1 - 6.2 mi

Top 12%
×5story building
+79ft-138ft

Overall

3472

Males

3291

M40-44

3291

10K→15K

6.2 - 9.3 mi

Top 16%
×3story building
+67ft-78ft

Overall

4500

Males

4217

M40-44

4217

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4672

Males

4334

M40-44

4334

20K→Half

12.4 - 13.1 mi

Top 18%
×2story building
+19ft-37ft

Overall

5002

Males

4631

M40-44

4631

Half→25K

13.1 - 15.5 mi

Top 24%
×4story building
+66ft-88ft

Overall

6874

Males

6025

M40-44

6025

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

6238

Males

5475

M40-44

5475

30K→20M

18.6 - 20.0 mi

Top 21%
×5story building
+64ft-50ft

Overall

5973

Males

5175

M40-44

5175

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6654

Males

5465

M40-44

5465

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6820

Males

5579

M40-44

5579

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12124

Males

8281

M40-44

8281

23M→24M

23.0 - 24.0 mi

Top 48%
×6story building
+12ft-82ft

Overall

13530

Males

8902

M40-44

8902

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13989

Males

8981

M40-44

8981

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7618

Males

5677

M40-44

5677

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11885

Males

7966

M40-44

7966

Passing Analysis

Category:
Athletes Passed
420
Passed By
3394
Net Change
-2974
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3001
5K → 10K53276-223#3001#3224
10K → 15K16435-419#3224#3643
15K → 20K44235-191#3643#3834
20K → Half539-34#3834#3868
Half → 25K18445-427#3868#4295
25K → 30K59452-393#4295#4688
30K → 20M38160-122#4688#4810
20M → 21M38140-102#4810#4912
21M → 35K40102-62#4912#4974
35K → 23M25440-415#4974#5389
23M → 24M7247-240#5389#5629
24M → 40K16245-229#5629#5858
40K → 25.2M3025+5#5858#5853
25.2M → Finish31153-122#5853#5975
TOTALS4203394-2974
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing