Boston Marathon logo
BOSTON MARATHON 2025

Brian Geiszler

Bib: 7630•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M45-49)
#0 / 2386
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:17
Rank: #6707
Start → 5K
21:17 | 6:51/mi
10K· 6.21 mi
42:20
Rank: #6431 (+276)
5K → 10K
21:03 | 6:47/mi
15K· 9.32 mi
1:03:31
Rank: #6346 (+85)
10K → 15K
21:11 | 6:49/mi
20K· 12.43 mi
1:24:51
Rank: #6204 (+142)
15K → 20K
21:20 | 6:52/mi
Half· 13.11 mi
1:29:30
Rank: #6195 (+9)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:46:14
Rank: #6061 (+134)
Half → 25K
16:44 | 6:54/mi
30K· 18.64 mi
2:08:33
Rank: #5945 (+116)
25K → 30K
22:19 | 7:11/mi
20M
2:18:52
Rank: #6024 (-79)
30K → 20M
10:19 | 7:36/mi
21M
2:27:21
Rank: #6190 (-166)
20M → 21M
8:29 | 8:29/mi
35K· 21.75 mi
2:33:56
Rank: #6493 (-303)
21M → 35K
6:35 | 8:48/mi
23M
2:44:36
Rank: #6803 (-310)
35K → 23M
10:40 | 8:31/mi
24M
2:53:25
Rank: #7171 (-368)
23M → 24M
8:49 | 8:49/mi
40K· 24.85 mi
3:02:04
Rank: #7777 (-606)
24M → 40K
8:39 | 10:07/mi
25.2M
3:05:46
Rank: #8029 (-252)
40K → 25.2M
3:42 | 10:44/mi
Finish· 26.22 mi
3:14:04
Rank: #8249 (-220)
25.2M → Finish
8:18 | 8:09/mi

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
Time1:29:30
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:44:34
Pace7:59 /mi
📊Positive Split: 16.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:1921:176:5121:17
6:51
-
10K
6.21 mi10:50:2242:206:4921:03
6:47
-0:04
15K
9.32 mi11:11:331:03:316:4921:11
6:49
+0:02
20K
12.43 mi11:32:531:24:516:5021:20
6:52
+0:03
Half
13.11 mi11:37:321:29:306:504:39
6:49
-0:03
25K
15.53 mi11:54:161:46:146:5016:44
6:54
+0:05
30K
18.64 mi12:16:352:08:336:5422:19
7:11
+0:17
20M
20.00 mi12:26:542:18:526:5710:19
7:36
+0:25
21M
21.00 mi12:35:232:27:217:018:29
8:29
+0:53
35K
21.75 mi12:41:582:33:567:056:35
8:48
+0:19
23M
23.00 mi12:52:382:44:367:0910:40
8:31
-0:17
24M
24.00 mi13:01:272:53:257:148:49
8:49
+0:18
40K
24.85 mi13:10:063:02:047:208:39
10:07
+1:18
25.2M
25.20 mi13:13:483:05:467:223:42
10:44
+0:37
Finish
26.22 mi13:22:063:14:047:248:18
8:09
-2:35

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

6:47 /mi

Average Pace

7:24 /mi

Slowest Pace

10:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:14

55% of race

Time at Steady Pace

40:56

21% of race

Time at Slower Pace

46:54

24% of race

Average Pace: 7:24 /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 mi10:29:1921:176:5121:17
6:51
#6707
10K
6.21 mi10:50:2242:206:4921:03
6:47
#6431
15K
9.32 mi11:11:331:03:316:4921:11
6:49
#6346
20K
12.43 mi11:32:531:24:516:5021:20
6:52
#6204
Half
13.11 mi11:37:321:29:306:504:39
6:49
#6195
25K
15.53 mi11:54:161:46:146:5016:44
6:54
#6061
30K
18.64 mi12:16:352:08:336:5422:19
7:11
#5945
20M
20.00 mi12:26:542:18:526:5710:19
7:36
#6024
21M
21.00 mi12:35:232:27:217:018:29
8:29
#6190
35K
21.75 mi12:41:582:33:567:056:35
8:48
#6493
23M
23.00 mi12:52:382:44:367:0910:40
8:31
#6803
24M
24.00 mi13:01:272:53:257:148:49
8:49
#7171
40K
24.85 mi13:10:063:02:047:208:39
10:07
#7777
25.2M
25.20 mi13:13:483:05:467:223:42
10:44
#8029
Finish
26.22 mi13:22:063:14:047:248:18
8:09
#8249
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6707608260826272(Top 22%)5682(Top 35%)5682(Top 238%)
10K6.21 mi3.10 mi6431+2765863+2195863+2196121(Top 22%)5583(Top 35%)5583(Top 234%)
15K9.32 mi3.11 mi6346+855784+795784+796272(Top 22%)5682(Top 35%)5682(Top 238%)
20K12.43 mi3.11 mi6204+1425649+1355649+1355926(Top 21%)5374(Top 33%)5374(Top 225%)
Half13.11 mi0.68 mi6195+95638+115638+116316(Top 22%)5701(Top 35%)5701(Top 239%)
25K15.53 mi2.42 mi6061+1345508+1305508+1305696(Top 20%)5158(Top 32%)5158(Top 216%)
30K18.64 mi3.11 mi5945+1165397+1115397+1115813(Top 20%)5175(Top 32%)5175(Top 217%)
20M20.00 mi1.36 mi6024-795437-405437-407614(Top 27%)6216(Top 39%)6216(Top 261%)
21M21.00 mi1.00 mi6190-1665555-1185555-11810312(Top 36%)7509(Top 47%)7509(Top 315%)
35K21.75 mi0.75 mi6493-3035772-2175772-21717202(Top 61%)10680(Top 66%)10680(Top 448%)
23M23.00 mi1.25 mi6803-3105961-1895961-18913390(Top 47%)8875(Top 55%)8875(Top 372%)
24M24.00 mi1.00 mi7171-3686178-2176178-21716369(Top 58%)10184(Top 63%)10184(Top 427%)
40K24.85 mi0.85 mi7777-6066530-3526530-35220803(Top 73%)12179(Top 76%)12179(Top 510%)
25.2M25.20 mi0.35 mi8029-2526679-1496679-14919748(Top 70%)11646(Top 72%)11646(Top 488%)
Finish26.22 mi1.02 mi8249-2206779-1006779-10013857(Top 49%)8926(Top 55%)8926(Top 374%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

6272

Males

5682

M45-49

5682

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

6121

Males

5583

M45-49

5583

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

6272

Males

5682

M45-49

5682

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5926

Males

5374

M45-49

5374

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6316

Males

5701

M45-49

5701

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5696

Males

5158

M45-49

5158

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5813

Males

5175

M45-49

5175

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7614

Males

6216

M45-49

6216

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

10312

Males

7509

M45-49

7509

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

17202

Males

10680

M45-49

10680

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

13390

Males

8875

M45-49

8875

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

16369

Males

10184

M45-49

10184

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20803

Males

12179

M45-49

12179

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19748

Males

11646

M45-49

11646

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

13857

Males

8926

M45-49

8926

Passing Analysis

Category:
Athletes Passed
1372
Passed By
2914
Net Change
-1542
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6707
5K → 10K35276+276#6707#6431
10K → 15K18499+85#6431#6346
15K → 20K21775+142#6346#6204
20K → Half3425+9#6204#6195
Half → 25K18349+134#6195#6061
25K → 30K236120+116#6061#5945
30K → 20M50129-79#5945#6024
20M → 21M27193-166#6024#6190
21M → 35K8311-303#6190#6493
35K → 23M31341-310#6493#6803
23M → 24M15383-368#6803#7171
24M → 40K9615-606#7171#7777
40K → 25.2M1253-252#7777#8029
25.2M → Finish25245-220#8029#8249
TOTALS13722914-1542
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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