Boston Marathon logo
BOSTON MARATHON 2023

Guido Keller

Bib: 31288•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
8:30/mi
26:24
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
52:25
↑ 79↓ 1380.4%
15K· 9.32 mi
8:39/mi
1:19:16
↑ 67↓ 78
20K· 12.43 mi
9:29/mi
1:48:44
↑ 106↓ 860.1%
Half· 13.11 mi
9:52/mi
1:55:28
↑ 19↓ 370.5%
25K· 15.53 mi
10:28/mi
2:20:51
↑ 66↓ 880.2%
30K· 18.64 mi
11:27/mi
2:56:25
↑ 181↓ 1480.2%
20M
10:20/mi
3:10:28
↑ 64↓ 500.2%
21M
11:28/mi
3:21:56
↑ 106↓ 241.6%
35K· 21.75 mi
10:35/mi
3:29:51
↑ 17↓ 861.7%
23M
12:48/mi
3:45:52
↑ 23↓ 630.6%
24M
12:49/mi
3:58:41
↓ 821.3%
40K· 24.85 mi
12:34/mi
4:09:26
↓ 200.3%
25.2M
13:55/mi
4:14:14
↑ 13↓ 160.2%
Finish· 26.22 mi
11:04/mi
4:25:31
↑ 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
Time1:55:28
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:30:03
Pace11:27 /mi
📊Positive Split: 30.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:3126:248:3026:24
8:30
-
10K
6.21 mi12:11:3252:258:2626:01
8:22
-0:08
15K
9.32 mi12:38:231:19:168:3026:51
8:39
+0:17
20K
12.43 mi13:07:511:48:448:4529:28
9:29
+0:50
Half
13.11 mi13:14:351:55:288:486:44
9:52
+0:23
25K
15.53 mi13:39:582:20:519:0425:23
10:28
+0:36
30K
18.64 mi14:15:322:56:259:2835:34
11:27
+0:59
20M
20.00 mi14:29:353:10:289:3114:03
10:20
-1:07
21M
21.00 mi14:41:033:21:569:3711:28
11:28
+1:08
35K
21.75 mi14:48:583:29:519:397:55
10:35
-0:53
23M
23.00 mi15:04:593:45:529:4916:01
12:48
+2:13
24M
24.00 mi15:17:483:58:419:5712:49
12:49
+0:01
40K
24.85 mi15:28:334:09:2610:0210:45
12:34
-0:15
25.2M
25.20 mi15:33:214:14:1410:054:48
13:55
+1:21
Finish
26.22 mi15:44:384:25:3110:0811:17
11:04
-2:51

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

8:22 /mi

Average Pace

10:08 /mi

Slowest Pace

13:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:44

41% of race

Time at Steady Pace

1:05:22

25% of race

Time at Slower Pace

1:31:25

34% of race

Average Pace: 10:08 /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 mi11:45:3126:248:3026:24
8:30
#17541
10K
6.21 mi12:11:3252:258:2626:01
8:22
#17441
15K
9.32 mi12:38:231:19:168:3026:51
8:39
#17882
20K
12.43 mi13:07:511:48:448:4529:28
9:29
#19064
Half
13.11 mi13:14:351:55:288:486:44
9:52
#19365
25K
15.53 mi13:39:582:20:519:0425:23
10:28
#20424
30K
18.64 mi14:15:322:56:259:2835:34
11:27
#21367
20M
20.00 mi14:29:353:10:289:3114:03
10:20
#21356
21M
21.00 mi14:41:033:21:569:3711:28
11:28
#21392
35K
21.75 mi14:48:583:29:519:397:55
10:35
#21455
23M
23.00 mi15:04:593:45:529:4916:01
12:48
#21811
24M
24.00 mi15:17:483:58:419:5712:49
12:49
#22046
40K
24.85 mi15:28:334:09:2610:0210:45
12:34
#22198
25.2M
25.20 mi15:33:214:14:1410:054:48
13:55
#22267
Finish
26.22 mi15:44:384:25:3110:0811:17
11:04
#22343
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi17541112451124518687(Top 70%)11755(Top 77%)11755(Top 827%)
10K6.21 mi3.10 mi17441+10011232+1311232+1317400(Top 65%)11259(Top 74%)11259(Top 792%)
15K9.32 mi3.11 mi17882-44111408-17611408-17618687(Top 70%)11755(Top 77%)11755(Top 827%)
20K12.43 mi3.11 mi19064-118211890-48211890-48221503(Top 81%)12958(Top 85%)12958(Top 911%)
Half13.11 mi0.68 mi19365-30111999-10911999-10923007(Top 86%)13629(Top 90%)13629(Top 958%)
25K15.53 mi2.42 mi20424-105912455-45612455-45623139(Top 87%)13653(Top 90%)13653(Top 960%)
30K18.64 mi3.11 mi21367-94312859-40412859-40423785(Top 89%)13873(Top 91%)13873(Top 976%)
20M20.00 mi1.36 mi21356+1112839+2012839+2021360(Top 80%)12723(Top 84%)12723(Top 895%)
21M21.00 mi1.00 mi21392-3612850-1112850-1121821(Top 82%)12903(Top 85%)12903(Top 907%)
35K21.75 mi0.75 mi21455-6312871-2112871-2122524(Top 85%)13165(Top 87%)13165(Top 926%)
23M23.00 mi1.25 mi21811-35613019-14813019-14824880(Top 93%)14281(Top 94%)14281(Top 1004%)
24M24.00 mi1.00 mi22046-23513122-10313122-10325340(Top 95%)14471(Top 95%)14471(Top 1018%)
40K24.85 mi0.85 mi22198-15213179-5713179-5724516(Top 92%)14051(Top 93%)14051(Top 988%)
25.2M25.20 mi0.35 mi22267-6913205-2613205-2624935(Top 94%)14246(Top 94%)14246(Top 1002%)
Finish26.22 mi1.02 mi22343-7613229-2413229-2424097(Top 91%)13863(Top 91%)13863(Top 975%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18687

Males

11755

M55-59

11755

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17400

Males

11259

M55-59

11259

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18687

Males

11755

M55-59

11755

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

21503

Males

12958

M55-59

12958

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

23007

Males

13629

M55-59

13629

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23139

Males

13653

M55-59

13653

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

23785

Males

13873

M55-59

13873

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

21360

Males

12723

M55-59

12723

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

21821

Males

12903

M55-59

12903

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22524

Males

13165

M55-59

13165

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24880

Males

14281

M55-59

14281

23M→24M

23.0 - 24.0 mi

Top 95%
×6story building
+12ft-82ft

Overall

25340

Males

14471

M55-59

14471

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24516

Males

14051

M55-59

14051

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

24935

Males

14246

M55-59

14246

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

24097

Males

13863

M55-59

13863

Passing Analysis

Category:
Athletes Passed
677
Passed By
5479
Net Change
-4802
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17541
5K → 10K373273+100#17541#17441
10K → 15K75516-441#17441#17882
15K → 20K171199-1182#17882#19064
20K → Half2303-301#19064#19365
Half → 25K91068-1059#19365#20424
25K → 30K14957-943#20424#21367
30K → 20M8170+11#21367#21356
20M → 21M4783-36#21356#21392
21M → 35K1982-63#21392#21455
35K → 23M14370-356#21455#21811
23M → 24M2237-235#21811#22046
24M → 40K10162-152#22046#22198
40K → 25.2M574-69#22198#22267
25.2M → Finish985-76#22267#22343
TOTALS6775479-4802
📊

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