Boston Marathon logo
BOSTON MARATHON 2025

Brian Carlsen

Bib: 11865•M

MN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M50-54)
#0 / 1996
Top 24%
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
7:18/mi
22:40
↑ 97↓ 3451.5%
10K· 6.21 mi
7:16/mi
45:15
↑ 79↓ 1380.4%
15K· 9.32 mi
7:09/mi
1:07:27
↑ 67↓ 78
20K· 12.43 mi
7:13/mi
1:29:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:02/mi
1:34:39
↑ 19↓ 370.5%
25K· 15.53 mi
7:07/mi
1:51:55
↑ 66↓ 880.2%
30K· 18.64 mi
7:31/mi
2:15:17
↑ 181↓ 1480.2%
20M
7:31/mi
2:25:30
↑ 64↓ 500.2%
21M
8:01/mi
2:33:31
↑ 106↓ 241.6%
35K· 21.75 mi
7:17/mi
2:38:58
↑ 17↓ 861.7%
23M
7:30/mi
2:48:22
↑ 23↓ 630.6%
24M
7:18/mi
2:55:40
↓ 821.3%
40K· 24.85 mi
7:38/mi
3:02:12
↓ 200.3%
25.2M
8:25/mi
3:05:06
↑ 13↓ 160.2%
Finish· 26.22 mi
7:19/mi
3:12:33
↑ 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
Time1:34:39
Pace7:13 /mi
2nd Half
Distance13.11 mi
Time1:37:54
Pace7:28 /mi
📊Positive Split: 3.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5822:407:1822:40
7:18
-
10K
6.21 mi11:12:3345:157:1722:35
7:16
-0:02
15K
9.32 mi11:34:451:07:277:1422:12
7:09
-0:07
20K
12.43 mi11:57:091:29:517:1422:24
7:13
+0:04
Half
13.11 mi12:01:571:34:397:134:48
7:02
-0:11
25K
15.53 mi12:19:131:51:557:1217:16
7:07
+0:05
30K
18.64 mi12:42:352:15:177:1523:22
7:31
+0:24
20M
20.00 mi12:52:482:25:307:1610:13
7:31
0:00
21M
21.00 mi13:00:492:33:317:198:01
8:01
+0:30
35K
21.75 mi13:06:162:38:587:195:27
7:17
-0:44
23M
23.00 mi13:15:402:48:227:199:24
7:30
+0:13
24M
24.00 mi13:22:582:55:407:197:18
7:18
-0:12
40K
24.85 mi13:29:303:02:127:206:32
7:38
+0:20
25.2M
25.20 mi13:32:243:05:067:212:54
8:25
+0:47
Finish
26.22 mi13:39:513:12:337:217:27
7:19
-1:06

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

7:02 /mi

Average Pace

7:21 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:38

94% of race

Time at Steady Pace

8:01

4% of race

Time at Slower Pace

2:54

2% of race

Average Pace: 7:21 /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 mi10:49:5822:407:1822:40
7:18
#10302
10K
6.21 mi11:12:3345:157:1722:35
7:16
#10188
15K
9.32 mi11:34:451:07:277:1422:12
7:09
#9628
20K
12.43 mi11:57:091:29:517:1422:24
7:13
#9248
Half
13.11 mi12:01:571:34:397:134:48
7:02
#9169
25K
15.53 mi12:19:131:51:557:1217:16
7:07
#8716
30K
18.64 mi12:42:352:15:177:1523:22
7:31
#8488
20M
20.00 mi12:52:482:25:307:1610:13
7:31
#8335
21M
21.00 mi13:00:492:33:317:198:01
8:01
#8215
35K
21.75 mi13:06:162:38:587:195:27
7:17
#8125
23M
23.00 mi13:15:402:48:227:199:24
7:30
#7971
24M
24.00 mi13:22:582:55:407:197:18
7:18
#7876
40K
24.85 mi13:29:303:02:127:206:32
7:38
#7816
25.2M
25.20 mi13:32:243:05:067:212:54
8:25
#7801
Finish
26.22 mi13:39:513:12:337:217:27
7:19
#7759
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi10302832683268663(Top 30%)7349(Top 46%)7349(Top 368%)
10K6.21 mi3.10 mi10188+1148260+668260+6610064(Top 35%)8174(Top 51%)8174(Top 410%)
15K9.32 mi3.11 mi9628+5607941+3197941+3198663(Top 30%)7349(Top 46%)7349(Top 368%)
20K12.43 mi3.11 mi9248+3807701+2407701+2408279(Top 29%)7033(Top 44%)7033(Top 352%)
Half13.11 mi0.68 mi9169+797657+447657+447801(Top 27%)6763(Top 42%)6763(Top 339%)
25K15.53 mi2.42 mi8716+4537368+2897368+2897109(Top 25%)6199(Top 38%)6199(Top 311%)
30K18.64 mi3.11 mi8488+2287173+1957173+1957888(Top 28%)6515(Top 40%)6515(Top 326%)
20M20.00 mi1.36 mi8335+1537051+1227051+1227124(Top 25%)5919(Top 37%)5919(Top 297%)
21M21.00 mi1.00 mi8215+1206941+1106941+1107420(Top 26%)5923(Top 37%)5923(Top 297%)
35K21.75 mi0.75 mi8125+906863+786863+787129(Top 25%)5781(Top 36%)5781(Top 290%)
23M23.00 mi1.25 mi7971+1546719+1446719+1446657(Top 23%)5398(Top 34%)5398(Top 270%)
24M24.00 mi1.00 mi7876+956624+956624+956415(Top 23%)5170(Top 32%)5170(Top 259%)
40K24.85 mi0.85 mi7816+606555+696555+697678(Top 27%)5816(Top 36%)5816(Top 291%)
25.2M25.20 mi0.35 mi7801+156532+236532+238188(Top 29%)6012(Top 37%)6012(Top 301%)
Finish26.22 mi1.02 mi7759+426480+526480+527829(Top 28%)5807(Top 36%)5807(Top 291%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21story building
+97ft-345ft

Overall

8663

Males

7349

M50-54

7349

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

10064

Males

8174

M50-54

8174

10K→15K

6.2 - 9.3 mi

Top 30%
×3story building
+67ft-78ft

Overall

8663

Males

7349

M50-54

7349

15K→20K

9.3 - 12.4 mi

Top 29%
×5story building
+106ft-86ft

Overall

8279

Males

7033

M50-54

7033

20K→Half

12.4 - 13.1 mi

Top 27%
×2story building
+19ft-37ft

Overall

7801

Males

6763

M50-54

6763

Half→25K

13.1 - 15.5 mi

Top 25%
×4story building
+66ft-88ft

Overall

7109

Males

6199

M50-54

6199

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7888

Males

6515

M50-54

6515

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7124

Males

5919

M50-54

5919

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

7420

Males

5923

M50-54

5923

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

7129

Males

5781

M50-54

5781

35K→23M

21.8 - 23.0 mi

Top 23%
×5story building
+23ft-63ft

Overall

6657

Males

5398

M50-54

5398

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6415

Males

5170

M50-54

5170

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7678

Males

5816

M50-54

5816

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8188

Males

6012

M50-54

6012

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

7829

Males

5807

M50-54

5807

Passing Analysis

Category:
Athletes Passed
3114*
Passed By
571
Net Change
+2543
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10302
5K → 10K302188+114#10302#10188
10K → 15K573*13+560#10188#9628
15K → 20K40222+380#9628#9248
20K → Half878+79#9248#9169
Half → 25K4585+453#9169#8716
25K → 30K31991+228#8716#8488
30K → 20M18229+153#8488#8335
20M → 21M14929+120#8335#8215
21M → 35K10818+90#8215#8125
35K → 23M18834+154#8125#7971
23M → 24M12025+95#7971#7876
24M → 40K10040+60#7876#7816
40K → 25.2M4126+15#7816#7801
25.2M → Finish8543+42#7801#7759
TOTALS3114*571+2543

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

📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing