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BOSTON MARATHON 2023

Christopher Sonderby

Bib: 12316•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Male)
#0 / 15176
Top 45%
Masters (Masters Men)
#0 / 9891
Top 33%
Division (M55-59)
#0 / 1422
Top 15%
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
7:38/mi
23:42
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:53
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:10:20
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:34:10
↑ 106↓ 860.1%
Half· 13.11 mi
7:27/mi
1:39:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:30/mi
1:57:26
↑ 66↓ 880.2%
30K· 18.64 mi
7:38/mi
2:21:10
↑ 181↓ 1480.2%
20M
7:36/mi
2:31:30
↑ 64↓ 500.2%
21M
7:47/mi
2:39:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:08/mi
2:44:37
↑ 17↓ 861.7%
23M
7:22/mi
2:53:51
↑ 23↓ 630.6%
24M
7:17/mi
3:01:08
↓ 821.3%
40K· 24.85 mi
7:17/mi
3:07:22
↓ 200.3%
25.2M
7:38/mi
3:10:00
↑ 13↓ 160.2%
Finish· 26.22 mi
6:48/mi
3:16:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:15
Pace7:34 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:37:41
Pace7:27 /mi
📊Negative Split: 1.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3823:427:3823:42
7:38
-
10K
6.21 mi11:14:4946:537:3323:11
7:28
-0:10
15K
9.32 mi11:38:161:10:207:3323:27
7:33
+0:05
20K
12.43 mi12:02:061:34:107:3523:50
7:40
+0:07
Half
13.11 mi12:07:111:39:157:345:05
7:27
-0:13
25K
15.53 mi12:25:221:57:267:3418:11
7:30
+0:03
30K
18.64 mi12:49:062:21:107:3423:44
7:38
+0:08
20M
20.00 mi12:59:262:31:307:3410:20
7:36
-0:02
21M
21.00 mi13:07:132:39:177:357:47
7:47
+0:11
35K
21.75 mi13:12:332:44:377:345:20
7:08
-0:39
23M
23.00 mi13:21:472:53:517:349:14
7:22
+0:14
24M
24.00 mi13:29:043:01:087:337:17
7:17
-0:05
40K
24.85 mi13:35:183:07:227:326:14
7:17
0:00
25.2M
25.20 mi13:37:563:10:007:322:38
7:38
+0:21
Finish
26.22 mi13:44:523:16:567:316:56
6:48
-0:50

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

6:48 /mi

Average Pace

7:31 /mi

Slowest Pace

7:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:03:17

32% of race

Time at Steady Pace

2:13:39

68% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:51:3823:427:3823:42
7:38
#10772
10K
6.21 mi11:14:4946:537:3323:11
7:28
#10417
15K
9.32 mi11:38:161:10:207:3323:27
7:33
#10454
20K
12.43 mi12:02:061:34:107:3523:50
7:40
#10489
Half
13.11 mi12:07:111:39:157:345:05
7:27
#10458
25K
15.53 mi12:25:221:57:267:3418:11
7:30
#10130
30K
18.64 mi12:49:062:21:107:3423:44
7:38
#9763
20M
20.00 mi12:59:262:31:307:3410:20
7:36
#9561
21M
21.00 mi13:07:132:39:177:357:47
7:47
#9302
35K
21.75 mi13:12:332:44:377:345:20
7:08
#9150
23M
23.00 mi13:21:472:53:517:349:14
7:22
#8913
24M
24.00 mi13:29:043:01:087:337:17
7:17
#8770
40K
24.85 mi13:35:183:07:227:326:14
7:17
#8612
25.2M
25.20 mi13:37:563:10:007:322:38
7:38
#8526
Finish
26.22 mi13:44:523:16:567:316:56
6:48
#8273
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi107728544854410549(Top 40%)8423(Top 56%)8423(Top 592%)
10K6.21 mi3.10 mi10417+3558367+1778367+17710150(Top 38%)8245(Top 54%)8245(Top 580%)
15K9.32 mi3.11 mi10454-378396-298396-2910549(Top 40%)8423(Top 56%)8423(Top 592%)
20K12.43 mi3.11 mi10489-358409-138409-1310662(Top 40%)8406(Top 55%)8406(Top 591%)
Half13.11 mi0.68 mi10458+318392+178392+179736(Top 37%)7929(Top 52%)7929(Top 558%)
25K15.53 mi2.42 mi10130+3288198+1948198+1948776(Top 33%)7301(Top 48%)7301(Top 513%)
30K18.64 mi3.11 mi9763+3677962+2367962+2368224(Top 31%)6820(Top 45%)6820(Top 480%)
20M20.00 mi1.36 mi9561+2027814+1487814+1487515(Top 28%)6291(Top 41%)6291(Top 442%)
21M21.00 mi1.00 mi9302+2597635+1797635+1796096(Top 23%)5265(Top 35%)5265(Top 370%)
35K21.75 mi0.75 mi9150+1527527+1087527+1086107(Top 23%)5315(Top 35%)5315(Top 374%)
23M23.00 mi1.25 mi8913+2377366+1617366+1615733(Top 22%)5009(Top 33%)5009(Top 352%)
24M24.00 mi1.00 mi8770+1437259+1077259+1076267(Top 24%)5264(Top 35%)5264(Top 370%)
40K24.85 mi0.85 mi8612+1587148+1117148+1115407(Top 20%)4637(Top 31%)4637(Top 326%)
25.2M25.20 mi0.35 mi8526+867090+587090+584601(Top 17%)4014(Top 26%)4014(Top 282%)
Finish26.22 mi1.02 mi8273+2536902+1886902+1884108(Top 15%)3629(Top 24%)3629(Top 255%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10549

Males

8423

M55-59

8423

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10150

Males

8245

M55-59

8245

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10549

Males

8423

M55-59

8423

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10662

Males

8406

M55-59

8406

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

9736

Males

7929

M55-59

7929

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

8776

Males

7301

M55-59

7301

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8224

Males

6820

M55-59

6820

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

7515

Males

6291

M55-59

6291

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6096

Males

5265

M55-59

5265

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6107

Males

5315

M55-59

5315

35K→23M

21.8 - 23.0 mi

Top 22%
×5story building
+23ft-63ft

Overall

5733

Males

5009

M55-59

5009

23M→24M

23.0 - 24.0 mi

Top 24%
×6story building
+12ft-82ft

Overall

6267

Males

5264

M55-59

5264

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5407

Males

4637

M55-59

4637

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4601

Males

4014

M55-59

4014

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2story building
+22ft-21ft

Overall

4108

Males

3629

M55-59

3629

Passing Analysis

Category:
Athletes Passed
3120*
Passed By
621
Net Change
+2499
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10772
5K → 10K504*149+355#10772#10417
10K → 15K180217-37#10417#10454
15K → 20K138173-35#10454#10489
20K → Half5019+31#10489#10458
Half → 25K34315+328#10458#10130
25K → 30K392*25+367#10130#9763
30K → 20M2075+202#9763#9561
20M → 21M2601+259#9561#9302
21M → 35K1531+152#9302#9150
35K → 23M2436+237#9150#8913
23M → 24M1463+143#8913#8770
24M → 40K1613+158#8770#8612
40K → 25.2M893+86#8612#8526
25.2M → Finish2541+253#8526#8273
TOTALS3120*621+2499

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

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing